I've been following the great battery impression thread, which discusses ways to tweak the Nexus 4 settings, ROMs, and so forth for maximum run time between charging. This thread focuses on a different battery concern.
The Nexus 4 lithium polymer battery is sealed, and as far as I know, there are still several unknowns about replacing it. We've seen a tear-down showing how to remove the battery. However, as of now, few users have attempted it and there's not a consensus about how easy or difficult it is to do. Questions include:
Even with the correct tools, are the tabs that secure the Nexus 4's back prone to breakage, potentially leaving the case borked?
Is the battery difficult to extricate from its compartment?
Will it a high quality replacement battery become available inexpensively on eBay and elsewhere, or is it this battery, which was not designed to be user-replaceable, too much of an oddball for that to happen meaning that a replacement battery will be expensive and hard to find?
That said, the ease (or lack thereof) of replacing the Nexus 4's battery isn't what I've come here to discuss.
Given the unknowns about battery replacement, my concern is to how to maximize the Nexus 4 battery charge cycles and reduce the capacity drop of the battery over time. It could be bad if after just a year, the Nexus 4's capacity is already noticeably dropping. Not possible? I'm not so sure. Based on what I've read, it may depend upon how we handle charging.
This article at "Battery University" discusses the discharge characteristics of Lithium batteries, and it is my understanding that Lithium Polymer batteries, like the one in the Nexus 4 mirror these characteristics.
My takeaway from the article is:
Charging the Nexus 4 battery before it drops to less than 50% capacity will greatly increase the number of charge cycles before there's a noticeable capacity drop. Letting the battery nearly completely discharge will greatly reduce the number of charge cycles, and therefore greatly reduce the time before battery replacement will be necessary. (Table 2)
Inductive (wireless) charging, while convenient, generates extra heat that will over time reduce the recoverable capacity of the battery. (Table 3)
Having read this article, I am curious about the charging characteristics of the Nexus 4 and which, if any, charging variables we can control as users to maximize battery longevity.
When I first get a new smartphone I try to do a handful of full cycle charges before doing any partial charges. Your battery is still "new" and in the "break in" period. Many users that were the first to get theirs have reported their battery life as getting better. Of course a lot to do with battery are things like your data usage and what you have syncing.
RealiZms said:
When I first get a new smartphone I try to do a handful of full cycle charges before doing any partial charges. Your battery is still "new" and in the "break in" period. Many users that were the first to get theirs have reported their battery life as getting better. Of course a lot to do with battery are things like your data usage and what you have syncing.
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Click to collapse
Thanks, but I will again clarify that that I created this thread to discuss maximizing the Nexus 4 battery's long-term life and recoverable capacity, not maximizing run-down time in the short-term. That is already being discussed extensively in the great battery impression thread.
I have had a lot of experience with LiIon batteries over the years and I can tell you that the enemy of them is both inactivity and deep discharge use.
Use your phone as you normally would, but avoid frequent deep discharges. Don't be afraid about the number of charge cycles. Frequent charges are better than deep discharge cycles.
These pups have been designed to be used the way most folks use frequently used rechargeable devices. Pop it on the charger when you can, even if you know it won't be there long enough to be topped off. The more frequent and varied activity the better.
I'll add that I do not currently see an LG BL-T5 Nexus 4 replacement battery sold anywhere.
FYI - The Nexus 4 uses an 800 cycle battery as well so makes it even less of a thing to worry about. My SGS2 still gives me good battery life and it's more than 1yr old already, and i think that is a 300 cycle battery. Remember also that at that 800 cycle mark the battery should still have 80% of it's original capacity. 800 cycles is more than 2yrs of constant use/charge every night and for people that don't so much that could put you in the 3yr-4yr range. If you still have this phone 4yrs from now, i think you wont need to complain if it "only" has 80% of it's original charge.
Hi
borntochill said:
I've been following the great battery impression thread, which discusses ways to tweak the Nexus 4 settings, ROMs, and so forth for maximum run time between charging. This thread focuses on a different battery concern.
The Nexus 4 lithium polymer battery is sealed, and as far as I know, there are still several unknowns about replacing it. We've seen a tear-down showing how to remove the battery. However, as of now, few users have attempted it and there's not a consensus about how easy or difficult it is to do. Questions include:
Even with the correct tools, are the tabs that secure the Nexus 4's back prone to breakage, potentially leaving the case borked?
Is the battery difficult to extricate from its compartment?
Will it a high quality replacement battery become available inexpensively on eBay and elsewhere, or is it this battery, which was not designed to be user-replaceable, too much of an oddball for that to happen meaning that a replacement battery will be expensive and hard to find?
That said, the ease (or lack thereof) of replacing the Nexus 4's battery isn't what I've come here to discuss.
Given the unknowns about battery replacement, my concern is to how to maximize the Nexus 4 battery charge cycles and reduce the capacity drop of the battery over time. It could be bad if after just a year, the Nexus 4's capacity is already noticeably dropping. Not possible? I'm not so sure. Based on what I've read, it may depend upon how we handle charging.
This article at "Battery University" discusses the discharge characteristics of Lithium batteries, and it is my understanding that Lithium Polymer batteries, like the one in the Nexus 4 mirror these characteristics.
My takeaway from the article is:
Charging the Nexus 4 battery before it drops to less than 50% capacity will greatly increase the number of charge cycles before there's a noticeable capacity drop. Letting the battery nearly completely discharge will greatly reduce the number of charge cycles, and therefore greatly reduce the time before battery replacement will be necessary. (Table 2)
Inductive (wireless) charging, while convenient, generates extra heat that will over time reduce the recoverable capacity of the battery. (Table 3)
Having read this article, I am curious about the charging characteristics of the Nexus 4 and which, if any, charging variables we can control as users to maximize battery longevity.
Click to expand...
Click to collapse
There is little point in worrying about charging before it's discharged to 50% and/or not charging to maximum. Yes it increases the number of cycles, but is reducing runtime between those cycles, so you have to charge it twice as often using up the extra cycles gained, so overall it tends to even out.
The longevity argument for only partial discharges really only applies at the time of design and specification where the manufacturer can spec a larger battery and sacrifice some of the capacity (by only charging say from 30 to 70%) to get extra charge cycles. Clearly with a mobile phone this isn't desirable to do, as we crave all the the runtime we can get in the smallest form factor possible.
Regards
Phil
shotta35 said:
FYI - The Nexus 4 uses an 800 cycle battery as well so makes it even less of a thing to worry about. My SGS2 still gives me good battery life and it's more than 1yr old already, and i think that is a 300 cycle battery. Remember also that at that 800 cycle mark the battery should still have 80% of it's original capacity. 800 cycles is more than 2yrs of constant use/charge every night and for people that don't so much that could put you in the 3yr-4yr range. If you still have this phone 4yrs from now, i think you wont need to complain if it "only" has 80% of it's original charge.
Click to expand...
Click to collapse
Is the "800 cycle" rating is based on real world usage, or a set of idealized laboratory conditions that few users will actually meet? Many Nexus 4 forum users are reporting running down their batteries to a discharge depth exceeding 90% on a daily basis before recharging. This will dramatically reduce their battery's number of charge cycles. The "800 cycle" rating is only useful if we know the conditions upon which it was tested.
PhilipL said:
Hi
There is little point in worrying about charging before it's discharged to 50% and/or not charging to maximum. Yes it increases the number of cycles, but is reducing runtime between those cycles, so you have to charge it twice as often using up the extra cycles gained, so overall it tends to even out.
The longevity argument for only partial discharges really only applies at the time of design and specification where the manufacturer can spec a larger battery and sacrifice some of the capacity (by only charging say from 30 to 70%) to get extra charge cycles. Clearly with a mobile phone this isn't desirable to do, as we crave all the the runtime we can get in the smallest form factor possible.
Regards
Phil
Click to expand...
Click to collapse
Point taken, although it looks to me like the relationship between discharge depth and maximum number of charge cycles is not linear. From the way I read it, frequent deep discharging can markedly impact battery longevity which is why I'm skeptical of the 800 cycle figure. Given that many Nexus 4 users are currently reporting an inability to make it through a full day without completely draining their battery, those particular users are bound to have shortened battery longevity unless they charge at least twice/day.
Hi
borntochill said:
Point taken, although it looks to me like the relationship between discharge depth and maximum number of charge cycles is not linear. From the way I read it, frequent deep discharging can markedly impact battery longevity which is why I'm skeptical of the 800 cycle figure. Given that many Nexus 4 users are currently reporting an inability to make it through a full day without completely draining their battery, those particular users are bound to have shortened battery longevity unless they charge at least twice/day.
Click to expand...
Click to collapse
Yes it isn't linear, but the advantages are also outweighed by the negatives, such as having to plug it in more often to charge, and if people are struggling to get through the day now on a full charge/discharge cycle.....
The 800 cycle figure is probably about right for chemistry used in the LG Nexus, and most of us will have replaced our phone in a couple of years anyway long before we start to notice the lowered battery life.
The other thing with a lithium batteries is they are like perishable foods, even if we don't use them much, after a few years the capacity has diminished anyway. So even if we only charged the phone twice in two years, the third charge capacity would probably not be that much different to having charged it every day for two years.
So we shouldn't worry about the battery, the best thing we can do is use it as much as possible as it is going to degrade anyway, and we will see little benefit from treating it with kit gloves.
The above also assumes the battery can never be replaced. It certainly is replaceable by the manufacturer or a repair centre, and more than likely most of us could manage a replacement ourselves.
Regards
Phil
One very important thing to realize is that these 500/800 or whatever hundred cycles it's talking about is not how many times it can be charged, period.
It's not like after the 500th or 800th charge, this battery can never be powered on again.
Read the article closely:
" the number of discharge/charge cycles Li-ion can deliver at various DoD levels before the battery capacity drops to 70 percent."
Also, if you lower the voltage of the charge, it seems battery long term life greatly increases:
"Most Li-ions are charged to 4.20V/cell and every reduction of 0.10V/cell is said to double cycle life. For example, a lithium-ion cell charged to 4.20V/cell typically delivers 300–500 cycles. If charged to only 4.10V/cell, the life can be prolonged to 600–1,000 cycles; 4.00V/cell should deliver 1,200–2,000 and 3.90V/cell 2,400–4,000 cycles. Table 4 summarizes these results. The values are estimate and depend on the type of li-ion-ion battery."
Hi
borntochill said:
Is the "800 cycle" rating is based on real world usage, or a set of idealized laboratory conditions that few users will actually meet? Many Nexus 4 forum users are reporting running down their batteries to a discharge depth exceeding 90% on a daily basis before recharging. This will dramatically reduce their battery's number of charge cycles. The "800 cycle" rating is only useful if we know the conditions upon which it was tested.
Click to expand...
Click to collapse
When a lithium battery is fully discharged, it isn't actually completely discharged. LG like other manufacturers will have programmed a level that shows 0% on the phone before it shuts down, but in reality this might still leave 10% or 20% or 2% capacity in reserve, we don't know the figure, but presumably LG have set both full and empty charge points to ensure we see around 800 cycles.
Regards
Phil
---------- Post added at 09:19 PM ---------- Previous post was at 09:10 PM ----------
Hi
ksc6000 said:
Also, if you lower the voltage of the charge, it seems battery long term life greatly increases:
"Most Li-ions are charged to 4.20V/cell and every reduction of 0.10V/cell is said to double cycle life. For example, a lithium-ion cell charged to 4.20V/cell typically delivers 300–500 cycles. If charged to only 4.10V/cell, the life can be prolonged to 600–1,000 cycles; 4.00V/cell should deliver 1,200–2,000 and 3.90V/cell 2,400–4,000 cycles. Table 4 summarizes these results. The values are estimate and depend on the type of li-ion-ion battery."
Click to expand...
Click to collapse
Yes you get more cycles, but because you have a battery with reduced capacity, you are having to charge it more. Overall the benefit isn't as great as the numbers make it. If LG wanted to give us 1600 cycles they could lower the charge voltages, but then the battery capacity would have to be advertised at around 1050mAh, meaning it lasts half the time it does now, and will need charging around twice as often.
For a mobile phone with a typical 2 year life span, the priority is to maximum the time between charges while ensuring the battery lasts the typical 2 years of most peoples phone contracts. It isn't a co-incidence that 800 charges works out as a bit over 2 years if you charge every day.
We don't need to worry about the battery, just enjoy using the phone. Also the battery doesn't just stop working at 800 cycles either, it just doesn't hold as much charge, but capacity is lost anyway over time regardless if you use it or not as lithium batteries start to age the moment they are made.
Regards
Phil
PhilipL said:
For a mobile phone with a typical 2 year life span, the priority is to maximum the time between charges while ensuring the battery lasts the typical 2 years of most peoples phone contracts. It isn't a co-incidence that 800 charges works out as a bit over 2 years if you charge every day.
We don't need to worry about the battery, just enjoy using the phone.
Click to expand...
Click to collapse
A lot of assumptions there, Phil.
My "priorities" and LG's differ. 2 years from now, some will replace their Nexus 4 with whatever shiny new phone comes along that offers holographic video projection chat and does double duty as a sex robot. However, I will happily trudge on with my Nexus 4 for between 3 to 5 years which is how long I typically own a phone before replacement. I don't need bleeding edge, especially if the bleeding edge is a menstruating sex robot phone. Just sayin'.
We don't know if the Nexus 4 battery replacement will turn out to be either very costly and/or difficult. For those of us who don't plan to toss our Nexus 4 into a landfill two years from now, it pays to know what measures we can take to prolong battery longevity.
'Maximizing Nexus 4 battery'
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'Menstruating sex robot'
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Hmmmm....how did that happen...
I don't know if we will really know how good the battery longevity is in this thing until the device is a year old or more. Lithium polymer technology varies a lot. There have been a lot of advances with this tech in the last few years and some companies claim to have developed manufacturing techniques that allow THOUSANDS of charge before noticeable drops in batty capacity. Other technologies developed include the tech Apple uses and advertised in its MacBook line a few years ago that claimed longer battery life and very fast charging compared to Lithium Ion batteries. It all varies. LG claims to have some special tech baked into this battery that allows it to charge to a higher voltage compared to batteries of similar size, but I don't know how long its life is rated at.
666fff said:
'Maximizing Nexus 4 battery'
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'Menstruating sex robot'
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.
Hmmmm....how did that happen...
Click to expand...
Click to collapse
You apparently haven't seen the leaked mock-up of the Nexus 6.
borntochill said:
You apparently haven't seen the leaked mock-up of the Nexus 6.
Click to expand...
Click to collapse
I would consider an early upgrade for a menstruating Daryl Hannah any day
Related
hi!
guys, when should i charge the Galaxy S battery to maximize his life?
In my old phone, i only charge it when the phone shuts down himself. It can run for 7 days with no problems until i need to charge again.
Should i do the same thing with Galaxy S battery?
Well, when i need to connect the phone to the PC using USB cable, it will charge anyway. Is it bad? Should i do it only when i know the battery needs to be charged (when it has low battery)?
any time you want
it should always be topped up, there is no memory effect
Some people say that we should charge when the phone has 25% or 30% of the battery. And every month we should make a complete charge and discharge.
Is this a good method to keep the battery ok?
best way is to cycle through 2 or 3 batteries
charge them full
then use them down until you get the warning, and change to new battery pack, then take the used battery to the charger
http://forum.xda-developers.com/showthread.php?t=733705
Although I don't really have any definite sources to back this up, I've read several places that Li-Ion and Li-Polymer batteries can (and even should) be charged as often as possible. You should avoid letting them run flat, apparently.
What is certain though, is that they themselves have no memory effect like NiCd and NiMh batteries have.
our SGS will nag you to death as soon as it reaches 10%, and it will constantly annoys you to charge the battery at 5%
so, no worry about running flat
Technically to maximize the life (ie. capacity) of a Li-ion battery you should charge to full when it gets down to 40%.
The cooler the ambient temperature the better - A Li-ion battery operating at 25 degrees C will lose 20% of its capacity in one year. Higher temperatures drastically increase this degradation.
Given that most people will move to a newer phone after 2 years or so, and spare batteries are cheap as chips, it doesn't make a whole lot of difference.
So, people say that we should charge the battery when it has 30-40% of the capacity.
But what is the thechnical explanation?
Sent from my GT-I9000 using XDA App
that's exactly what i would like to know as well at 30%-40% will make the battery totally useless if that is true
might as well take the phone with a super long extension cold with you if that were true
LMAO
AllGamer said:
best way is to cycle through 2 or 3 batteries
charge them full
then use them down until you get the warning, and change to new battery pack, then take the used battery to the charger
http://forum.xda-developers.com/showthread.php?t=733705
Click to expand...
Click to collapse
I don't think that would be the best strategy, AFAIK (and read)
Li-ion packs prefer more frequent charges, even if after partial discharges, than full charge-discharge cycles.
Its also not good to store the pack fully charged. Best to store at 40% charge.
Following these 2 concepts, I imagine its better to charge the battery as often as possible, like every day, than to let it discharge until you get the warning.
Also, if you cycle through several packs, letting each one discharge almost completely, then charge it fully and move to a different pack like you suggested, that means you will be letting the battery unused at full charge for a longer period (the more packages you use, the longer the pack will stay stored at full charge).
Thats how I understand the behavior of those batteries. Just my 2 cents.
Paulo
I will say what the first reply said, charge as often as you feel you have time. Do not wait for any percentage of drain. There is no memory effect and yes about once a month do one full uninterrupted cycle. The point of which is to let the device's power management recalibrate where 0 (or thereabouts and 100% of the current fill are.
Cooler is better, this is also true.
All educated advice on Li-Ion batteries is that they remain healthier for longer the fuller they are, but the chemicals must be exercised occasionally, thus the full charge cycle in one go.
One charge cycle also actually counts over multiple charges, and not just uninterrupted ones. You can drain then charge 25% 4 times and that is counted as one cycle for these batteries.
I have always stuck to this advice since I learnt of it several years back and I find my batteries work better and longer than many people I know (who stick with drain, charge methods (lack of updated information).
i agree with nailerr
Simply charge it when you need to. It's better to have a fully charged battery when you need it, than run out of battery when an important call is coming through
So, the main reason to charge it with 30%-40% left is to avoid the battery heat too much?
I found this: h**p://batterycare.net/en/guide.html
It says more or less what you guys said here.
But you need to know that i always charge from 0% to 100% my old phone. It is 4 years old and it has no problems with the battery. It can run up to 7 days without any charge... Looks like charge it that way is not so bad anyway i guess...
My Droid 4 appears to charge to over 4.3V. Yikes!
Reported by Battery Monitor Widget Pro: 4.317V (pretty sure I saw 4.351V one time but I don't know how BMW calculates/reports voltage)
Measured with Fluke 88V across battery terminals: (drat...are there convenient probe contacts? didn't find anything obvious without deconstructing it)
Found this for the Nexus Galaxy
http://forum.xda-developers.com/showthread.php?t=1507528
Anything like this for the Droid 4? an app (root)?
It appears some sort of battery management boots when the phone is plugged in while turned off? Just curious since I always leave my phone on.
My past 3 smart phones I've kept for 3 to 6 years each. With the non-removable battery in the Droid 4 I'd like to find something to extend it's life.
I figure Motorola went with the lightest smallest battery that would power the thing for the better part of a work day and last for the average user's retention time for a phone (1 year? maybe 2?). It appears they are overcharging the battery to squeeze some extra capacity out of it. Greatly reduces the usable battery life but still meets the design criteria. I'd rather go with something like 10% - 90% charge cycles and double or (more likely) triple the life of the battery.
Right now I'm using Battery Monitor with the max voltage alarm but that means you have to be there to hear the alarm and unplug from the charger. Not really practical.
Since I mostly charge at home I'm considering wiring up a usb cable for my ElectriFly RC charger but that's not as convenient or flexible.
For reference, the following are excerpts from Battery University:
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
"Most cells charge to 4.20V/cell with a tolerance of +/–50mV/cell. Higher voltages could increase the capacity, but the resulting cell oxidation would reduce service life"
http://batteryuniversity.com/learn/article/the_li_polymer_battery_substance_or_hype
"Charge and discharge characteristics of Li-polymer are identical to other Li-ion systems "
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
"Most Li-ions are charged to 4.20V/cell and every reduction of 0.10V/cell is said to double cycle life. For example, a lithium-ion cell charged to 4.20V/cell typically delivers 300–500 cycles. If charged to only 4.10V/cell, the life can be prolonged to 600–1,000 cycles; 4.00V/cell should deliver 1,200–2,000 and 3.90V/cell 2,400–4,000 cycles. Table 4 summarizes these results. The values are estimate and depend on the type of li-ion-ion battery."
Charge Level (v) -- Discharge Cycles -- Capacity at Full Charge
---- [4.30] --------------- [150 - 250] -------------- [110%]
----- 4.20 ----------------- 300 - 500 ---------------- 100%
----- 4.10 ----------------- 500 - 1000 --------------- 90%
----- 4.00 --------------- 1200 - 2000 --------------- 70%
----- 3.92 --------------- 2400 - 4000 --------------- 50%
The Droid 4 uses a different kind of battery chemistry than most other li-ion batteries. You can read about it here on this Anandtech article on the RAZR (which uses the same chemistry, they didn't bother writing an article on the D4).
The interesting bit:
When I reviewed the Bionic, I made note of the device’s higher than normal Li-Ion voltage battery (3.8 V nominal) and later received word that this is actually a new Li-Ion battery chemistry that Motorola is adopting across its device line. We’ve now seen it in the Bionic, the Atrix 2, and thanks to some teardowns know that it’s inside the RAZR as well.
As an aside, people love to talk about how battery tech is going nowhere, but here we have a clear example of a few mass-market devices actually shipping with higher voltage batteries. Now that I know it exists, I want this in everything.
Interestingly enough, the sealed internal battery on the RAZR is 1750 mAh at 3.8 V (6.7 Whr) which is ever so slightly larger than the Bionic’s stock 1735 mAh at 3.8 V (6.6 Whr) battery. Like the Bionic, the battery has a thin profile and extends across almost the entire area of the device. We’ve now seen two different approaches to getting devices ultra thin: dual-sided PCBs that take up about a third of the areal profile (which is what Samsung and Apple do), saving the rest for a thick battery, and the Motorola approach with a single-sided PCB and a thin battery that extends over the entire area.
Click to expand...
Click to collapse
Anyway, the point is that that what you're seeing is normal. If your D4 isn't charging to that voltage (which can happen if your battery stats gets screwed up), battery life can be ... disappointing.
Hope this helps!
podspi said:
Anyway, the point is that that what you're seeing is normal. If your D4 isn't charging to that voltage (which can happen if your battery stats gets screwed up), battery life can be ... disappointing.
Click to expand...
Click to collapse
I agree that "normal" is "by design" but that's not what I want. I expect the designed duty cycle for the battery is less than 2 years.
I understand that charging to 90% will shorten time between getting on a charger but I can't go a whole day now anyway.
I plan to keep the phone for another 3, 4 or more years.
The battery or failure (worn out) is not covered under any of the warranty plans.
The battery is not removable and getting it replaced is probably not inexpensive (along with some probability of damaging the phone during replacement and probability of issues after).
My understanding is that (at least for now) upgrading or activating promotional equipment will cause me to lose my grandfathered $30 unlimited data.
Right now I usually charge in the morning, afternoon and late at night (phone stays on 24x7).
If I had something to limit charging to 90% unattended I would be leaving it on the charger over night and probably a couple of times during the day.
I am rarely away from a power source for very long. Charger at home, charger in the car, charger at work. Plugging in is not all that inconvenient.
If that triples the life of my battery that's HUGE.
The issue is leaving it on a charger unattended and having it stop charging at 90%.
[-deleted-]
Some more data:
http://forums.macrumors.com/archive/index.php/t-1429825.html
Another note:
These are 3.8V not 3.7V cells (100mV higher listed)
So, if you take your above chart and bump everything up by 100mV, 100% depth of charge is achieved at/around 4.3V (instead of 4.2V). I can believe a phone manufacturer would want to hit 100% charge if the cycles available are 300-500 (that's 1-2 years for 'average' users).
The info on that mac forum seems to indicate something about the 3.8V cells also having more available cycles, but that may be related to when they are used in stock configurations for the 3.7V cell (100mV less, double or better the usable cycle count).
Motorola is pretty good about covering their tracks and keeping things quiet (I worked on the communications equipment side of the pond for awhile) so finding spec's/data/charge curves for custom built batteries is going to be tricky. Easiest would be finding where they're getting them/re-branding and finding out exactly what they are.
Hope you can read Chinese
Brandon314159 said:
Some more data:
http://forums.macrumors.com/archive/index.php/t-1429825.html
Click to expand...
Click to collapse
This is the problem... (unless I missed it following all those links in that post) I didn't see any real data other than a battery labeled "3.8V". That post kind of sums it up in closing with:
Given the evidence, I think we'll likely see a new battery chemistry in the next iPhone. However, this needs to be taken with a grain of salt, since we don't know if the 3.8V chemistry is what LG is using. Even if we find out that the new LG battery is 3.8V, that doesn't mean it's the same 3.8V technology we're seeing in the new iPhone. Since Apple loves to talk about their batteries, if it is featured, I think there's a good possibility they may talk about it. If they do, that could confirm they're using LG's tech. Still, if they're using a 3.8V battery, one must ask why Apple made the change if it didn't have some benefits in store for the new iPhone ultimately. It does, without question, at least confirm a new battery chemistry. The nominal voltages of batteries are directly related to the chemistry utilized within, so you wouldn't get 3.7V and 3.8V both using the exact same chemistry.
From the anandtech article: Most of the time, users quote battery capacity in just mAh because you can be assured that the nominal per-cell voltage of consumer grade lithium-ion batteries is going to remain the same, at 3.7 V nominal, and 4.2 V fully charged for a Lithium-manganese oxide (LiMn2O4) battery. That isn’t something that was just decided on; the voltage falls literally out of the electrochemistry of the reaction. Lithium is the ideal anode for an electrochemical cell because it has the lowest redox potential, at –3.05 V, and it’s very light, at 6.94 g/mol. Combine that with a cathode of your choice, and you get a battery. Relatively standard cathode choices are things like Mn2O4 or CoO2 or NiO2, with the first and second being popular choices. In reality, a graphite anode is used alongside a LiMn2O4 cathode to make things safer, and ions migrate between the cathode and anode during charge and discharge. I’ll spare you the hand waving, but the anode reaction gives you –3.0 V, the cathode reaction 1.15 V, combine them, and you get a ΔE of 4.15 V. You can see where the 4.2 V comes from purely from this, with a little bit of fudge factor. Each battery is different, but it’s again just a material choice.
Click to expand...
Click to collapse
Still can't find any pointer to any "new chemistry" other than allusions to it... There hasn't been any new battery "chemistry" in years and I think that would be a really big deal. I'm sticking with the info in my first post for the time being. Especially the table at the bottom.
Lets look at it this way:
* charging to 4.3 V *
Right now, starting with a charged battery in the morning I have to put it on the charger about once during the day and it's pretty much done again at the end of the day. That's just sort of my average usage.
* charging to 4.1 V *
If I were to only charge it to 90% I would probably have to put it on the charger about twice during the day (and again at the end of the day) and I would approximately quadruple the usable number of charge cycles.
[i'm really bad at math...]
So I would be putting it on the charger 1.5 number of times to get a ~4x increase in the number of usable cycles?
I can deal with the inconvenience of an extra charge during the day for the added battery life before replacement is required.
I cannot deal with the inconvenience if each charge has to be attended (to unplug it when it reaches 4.1V)
Can someone do an app to cut off my charge at a configurable voltage?
You might have a look at this (not for the faint of heart):
http://www.researchgate.net/publica...e_Material_for_Lithium_Rechargeable_Batteries
Click "view" on the right when that page comes up.
It has more to do with chemistry than much else, but the basic premise is that by using certain cathode materials, stretching available capacity out of a Lithium Cobalt Oxide battery can warrant the higher voltage with less of an available cycle charges hit than you might think. They're talking about up to 4.5V in this article although they're admitting losses of available cycles at high voltages.
I just skimmed through it so if you're really curious, dig deep (I'm at work so limited).
I'm a chemistry major so take it with a grain of salt
Ok... that made my eyes bleed.
something about blah, blah ... increased stability up to 4.5v ... blah, blah, ...dual doping ... blah, blah, ...microwave heating for 25 minutes...
No idea if manufacturing it might cost more than the phone or if that is what might have gone into my Droid 4, or how quantify increased stability up to 4.5v in terms of increased cycles.
but yes, from what I can tell, it does look like someone made some sort of advancement in battery tech
Did anybody find an app to do this?
If the battery is only charged to about 75% it will last about 8 times more discharge cycles then if it was charged to 100% every time. Which is pretty damn much!
100% charge gives 350-400 Discharge cycles.
75% charge gives 2400-4000 Discharge cycles.
Source and good read with more tips how to treat your battery good:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
I don't know of any app or kernel that does this automatically, if you know or can program one please update this thread.
Meanwhile we have to just unplug charger by ourselves at around 70-75%
Please press thanks and write a reply what you think if this information was usefull to you!:good:
Well, if it's true, it's a huge improvement for only 25%, we can perfectly last a full day with 75% of battery
This is really good battery info. Thanks.
My personal view on the matter is for 15 bucks, I'd rather pick up a replacement battery a year or two from now when I may need it and just replace the cell rather than work to keep my phone charged closer to 75 percent every day in order to see some of the par-charge benefit the article discusses. I'm not suggesting that should be your position.
Based on how I use my phone, starting nearly every day closer to 75 percent than a full charge, I'm guaranteed to run to shutdown many more days than I would if I accumulated the expected number of full cycles. There's enough indicators to tip you off when you reach end-of-life on your cell: you usually see very significant shortened battery life and/or big cliffs in useage like draining evenly say between 100 and 78 percent and then going from 78 to 60, and then even depletion again usually indicates cells failing. Point is batteries don't go from good to bad overnight.
My perspective after just very recently moving into an S5 from a RAZR Maxx that required a good bit of phone disassembly to get to that battery, picking up a $15.00 replacement and keeping my battery topped off is the way to go. :good:
I have never had to replace a phone battery, they have always lasted until I upgrade. Great read but it seems the author was mainly referring to laptop batteries.
kgyirhj said:
If the battery is only charged to about 75% it will last about 8 times more discharge cycles then if it was charged to 100% every time. Which is pretty damn much!
100% charge gives 350-400 Discharge cycles.
75% charge gives 2400-4000 Discharge cycles.
Source and good read with more tips how to treat your battery good:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
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Be careful with info from batteryuniversity.com. It is largely geared towards engineers using raw cells, not users of consumer devices. This leads to people making incorrect assumptions. For example you may read there about the dangers of discharging Li-ion cells too far. But your device probably (if the engineers have any brains) already builds in some buffer, and shuts off/refuses to power on if it's a safe level above that. It's hard for us to know what levels Samsung considers empty and full in comparison to the actual cells.
I'm not saying this is bad advice, just that it may not really make that much of a difference in reality, and it's tough to do in practice.
my girlfriends S3 is 2 years old now and battery lasts still the same long as it was new.
i think phones anyway doesn't charge the battery to 100% full capacity or even let it discharge to 0%
Anyone tested this to see if it works better for battery performance?
Maybe if I had something like a HTC One I might do that because you have to be like a freaking safe cracker just to get at the battery, but on S5 I'll just keep going to 100% and buy a new battery after 9 months because I am a heavy user and lose a lot of capacity within a year.
Be careful with info from batteryuniversity.com. It is largely geared towards engineers using raw cells, not users of consumer devices. This leads to people making incorrect assumptions. For example you may read there about the dangers of discharging Li-ion cells too far. But your device probably (if the engineers have any brains) already builds in some buffer, and shuts off/refuses to power on if it's a safe level above that. It's hard for us to know what levels Samsung considers empty and full in comparison to the actual cells.
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thanks for the great info mate .
your input was needed.
It's just click bait, chances of keeping the phone for 4000 cycles is 0 for me.
I've been using both the incipio offgrid, and tumi powerpack battery mods (both are wireless charging variants) and have noticed just awful battery life. from 100% it charges my phone up maybe 15-20 percent, and thats with the screen off, just streaming music. If I'm using the phone (just surfing the web or instagram) the battery dies in around 30-45 minutes, is this normal? I expected alot more out of these. I can just stare at the notification bar and watch as the battery drops, my software is up to date, and I was just wondering if this is normal? Is everyone else getting this awful performance? I expected way more for like 70-80 bucks each...
Sky's Divide said:
I've been using both the incipio offgrid, and tumi powerpack battery mods (both are wireless charging variants) and have noticed just awful battery life. from 100% it charges my phone up maybe 15-20 percent, and thats with the screen off, just streaming music. If I'm using the phone (just surfing the web or instagram) the battery dies in around 30-45 minutes, is this normal? I expected alot more out of these. I can just stare at the notification bar and watch as the battery drops, my software is up to date, and I was just wondering if this is normal? Is everyone else getting this awful performance? I expected way more for like 70-80 bucks each...
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This is not normal. While I don't have either of these, based on the reading I've done and reports I've seen from people who do, the Incipio off grid should be able to charge your phone up 50-75% when attached. Not sure if you have some crazy wakelock that's keeping your CPU maxed out all the time or what, but dying in 30-40 minutes makes no sense.
xxBrun0xx said:
This is not normal. While I don't have either of these, based on the reading I've done and reports I've seen from people who do, the Incipio off grid should be able to charge your phone up 50-75% when attached. Not sure if you have some crazy wakelock that's keeping your CPU maxed out all the time or what, but dying in 30-40 minutes makes no sense.
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When I got it to die In 30-40 min I was on a phone call and surfing instagram. Took the tumi out yesterday with 80% battery in it and had my phones screen off streaming music over Bluetooth. The phone charged up about 25% before the battery pack died. Any ideas on how I could improve the battery life? My moto mods manager is up to date and I don't get any prompts to update anything whenever I snap on the mods
I was surprised when I found this post, so I checked how many percent of battery do I get with a my incipio battery mod. I plugged the mod, my phone's battery was at 15% and the battery mod was at 100%.
Now the Incipio battery mod is empty and my phone's battery is at 50%. So it charged my phone by 35%.
Pretty disappointing for a 2220 mAh battery that costs almost 100€ ...
To me the best use of the mod is to snap it on when the Moto Z Play is fully charged and to chose the option to keep the phone battery at 80%. With normal use, i've seen the mod keep the phone at 80% for up to a day. To me the mod is not meant to charge the phone but more to keep it from discharging.
To me the idea of the battery mod makes no sense.
There is an Aukey 16000 mAh power pack with QuickCharge 3.0 available which boosts the battery in nearly no time. I paid less than 20 Euro.
Who needs such a battery mod with a Moto Z Play which lasts all day under heavy usage?
Who needs such a battery mod when power packs are big, cheap and fast?
Who even needs the power pack if you have a wall outlet with a QuickCharge 3.0 charger boosting the battery percentage in no time? I needed that power pack when the previous phone (Moto X Play) had some hardware defect making it lose power.
Edit: These questions are meant honestly. Are you living in the desert for several days and can't afford to carry a bag?
tag68 said:
To me the idea of the battery mod makes no sense.
There is an Aukey 16000 mAh power pack with QuickCharge 3.0 available which boosts the battery in nearly no time. I paid less than 20 Euro.
Who needs such a battery mod with a Moto Z Play which lasts all day under heavy usage?
Who needs such a battery mod when power packs are big, cheap and fast?
Who even needs the power pack if you have a wall outlet with a QuickCharge 3.0 charger boosting the battery percentage in no time? I needed that power pack when the previous phone (Moto X Play) had some hardware defect making it lose power.
Edit: These questions are meant honestly. Are you living in the desert for several days and can't afford to carry a bag?
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The battery mods are not particularly useful for the Z Play because if you charge every night, you have basically unlimited battery life. Battery packs are extremely useful for the regular Z, though, which has extremely poor battery life on its own. They're basically mandatory for the Z.
I'm shocked that battery mods can only charge your internal battery and can't be used directly (discharging the mod battery instead of the internal battery), the same way Thinkpads that have more than one battery can do. That makes the $80 (vs maybe $10 for a 2000 mah ravpower) cost all the more eyebrow-raising.
I'd love to use them as a way of preserving the sealed in internal battery's longevity, making the internal battery the backup battery and wearing out the easily replaceable, easily swappable mods instead.
fortunz said:
I'd love to use them as a way of preserving the sealed in internal battery's longevity,
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What do you think how a battery should be treated to prolong its lifetime?
This is a serious question. I'm not sure if charging cycles do matter these days. The point which makes batteries getting weak is the age. An additional battery will not help reduce the age.
Of course you should be careful not to be in extreme cold or heat. If the battery is below 30 percent, you should consider to charge it. You should not charge it again if it's over 80 percent. But trying not to use it seems not to really be helpful for the battery to have a longer life, although battery lifetime usually is given in battery cycles. At least this is my experience. If it does not get hot when used or charged, all batteries nowadays start getting weaker a bit after about 2 years, it gets really recognizable after 4 years, and when they are 6-8 years old, they get so low that they may not fulfill there purpose anymore. Cycles? Never recognized any influence for the lifetime. But one hot day with a usage above average where the battery gets hot may really cause a recognizable decrease in capacity.
If you have some source comparing battery lifetime for different use cases (storage, low usage, middle usage, frequent usage, under different conditions of temperature, fast charge and slow charge) I'd be really interested.
tag68 said:
What do you think how a battery should be treated to prolong its lifetime?
This is a serious question. I'm not sure if charging cycles do matter these days. The point which makes batteries getting weak is the age. An additional battery will not help reduce the age.
Of course you should be careful not to be in extreme cold or heat. If the battery is below 30 percent, you should consider to charge it. You should not charge it again if it's over 80 percent. But trying not to use it seems not to really be helpful for the battery to have a longer life, although battery lifetime usually is given in battery cycles. At least this is my experience. If it does not get hot when used or charged, all batteries nowadays start getting weaker a bit after about 2 years, it gets really recognizable after 4 years, and when they are 6-8 years old, they get so low that they may not fulfill there purpose anymore. Cycles? Never recognized any influence for the lifetime. But one hot day with a usage above average where the battery gets hot may really cause a recognizable decrease in capacity.
If you have some source comparing battery lifetime for different use cases (storage, low usage, middle usage, frequent usage, under different conditions of temperature, fast charge and slow charge) I'd be really interested.
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Same sources as you, personal experience and basic knowledge (battery life being measured in cycles). I'm not even completely worried about average aging, but out of a batch of millions of batteries, plenty will start to experience rapid discharge early, even without abnormal heat, not to the point of being completely dead, but certainly no longer tolerable. Today's phone batteries might actually tolerate heat better than in the past, having been built for quick charging, which is the hottest a sd625 seems to get.
I've read manuals and battery university and a few tech blog articles all of which have differing advice, just like you and me, but I have yet to find a source I find credible (based on diverse large scale testing not limited anecdotal evidence or in the case of manuals, insanely outdated nicad-era stuff). And, sincerely no offense intended, I'm unlikely to decide cycles don't matter and weight your anecdotal evidence over mine anymore than you'd weight mine over yours. But if you ever find a good source with those comparisons, I'd be pleased to check it out too.
tag68 said:
Who needs such a battery mod with a Moto Z Play which lasts all day under heavy usage?
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Because I'm a very heavy user of my phone and don't want to worry about power even if I can't get to a outlet during the day.
Who needs such a battery mod when power packs are big, cheap and fast?
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Because the bat mod is easy to slap on and keep on all the time (when I'm not using a different mod). Then I never have to worry about taking the pack with me or not or carrying the extra cable with me or not.
Who even needs the power pack if you have a wall outlet with a QuickCharge 3.0 charger boosting the battery percentage in no time?
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Because I don't want to have to worry about having the charger with me or finding a spot to charge.
I fully admit that I tend to be more paranoid about running out of power than I need to be, but I like to be secure knowing that I should have more than enough battery life, even if I can't charge overnight. I like to know that I can grab my phone at any point of the day and walk out the door with it without having to worry about taking a charger with me.
RedRamage said:
I fully admit that I tend to be more paranoid about running out of power than I need to be, but I like to be secure knowing that I should have more than enough battery life, even if I can't charge overnight. I like to know that I can grab my phone at any point of the day and walk out the door with it without having to worry about taking a charger with me.
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I quite like just not having to charge for three days. I have the battery mod which I use on the efficiency mode, and I got over a full day out of it. At the end of day three I had nearly 30% battery left. Probably enough for most of one more day.
The other thing for me is using wireless charging. I like just slapping my phone on a stand overnight when I do charge it. It charges slowly, yes, but it doesn't matter if I am charging overnight. I still have access to the quick charger if I need to get a full battery quick!
I use mine on my motorcycle where I'm riding for 10 hours a day. I'm at about 50% in 4 hours and dead by 7 or 8, so I'm hoping with the additional battery MOD that I can get at least 12 hours charge. I'm really bad about remembering to plug my phone in when I stop for a break!
@tag68 : dude I think you totally missed to read what @fortunz was saying, he was only pointing that he would like the Mods to be used as a primary source battery instead of being a "ultra-portable power bank".
Given that there is also a fraction of the power being lost in the form of heat, during charge/transfer, it is even more silly from Motorola not to have the battery used directly. I can say by the 25-35% charge from the Mods estimated from other users, that the efficiency is somewhere around 50%, HORRIBLE to say the least.
And yeah I was reading through both of your posts and good information was provided, although unnecessary friction used (not naming anyone).
I actually have kind of the same idea from @fortunz to prolong the battery life of my Z-play even with the mod just being a power bank.
Saying that the mods (~2220mah) charge your phone anywhere between 25-35%, I can actually take the top 25-35% out of my internal battery use and move it to the Mod.
So I can charge my phone up to 70% before going to bed, and then when my phone reaches 30% during the use next day, I'll just slap the mod.
I can allow myself a lot of variation to this, I will not be religious about it, the topic is to avoid hitting 100% charge, and instead, moving the wear of that 30% usage to the Mod.
According, to many articles, citing just one below, considering the depth of discharges and voltage levels, you guys might do the equation if you like, but according to the charts and theory:
charging my phone twice a day trying not to exceed 70%, will give me WAY more longevity run than charging up to 100% every day.
First charge will be from around 15% which is my normal deadline to around 70% with a wall charger, before going to bed.
Second charge will be from the mod from around 30% to around 60% (hopefully), which will give me portability while charging.
Total screen on time during the day, should be around 10% less, but well worth and I can definitely take the hit if getting more battery longevity as a trade.
Source:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Huh, it even makes sense when explaining to other people...
In re: friction, I took no offense from the exchange. Hopefully I didn't cause any either.
Good luck with your efforts. I have considered using this app to to stop charging early: https://forum.xda-developers.com/android/apps-games/root-battery-charge-limit-t3557002 Haven't started using it yet.
fortunz said:
In re: friction, I took no offense from the exchange. Hopefully I didn't cause any either.
Good luck with your efforts. I have considered using this app to to stop charging early: https://forum.xda-developers.com/android/apps-games/root-battery-charge-limit-t3557002 Haven't started using it yet.
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Sadly that application requires root... and I don't want to unlock the bootloader and then having to worry about SafetyNet...
For me SafetyNet is green using Magisk 12.0 as root solution, but that may change of course. But it would help for the battery.
Short rant about this topic: It is strange that the owner of a device can be forbidden to restrict the charging. You bought it, you should be able to do these things with it. Introducing SafetyNet is a bad idea by Google. Security should be made by algorithms, not by hardware. Using public key anyone may modify anything, and you can still assure the content to be trustworthy. There no need to prove the Android not to be modified, it is just a bad idea, unnecessary restricting the user. Owner.
tag68 said:
For me SafetyNet is green using Magisk 12.0 as root solution, but that may change of course. But it would help for the battery.
Short rant about this topic: It is strange that the owner of a device can be forbidden to restrict the charging. You bought it, you should be able to do these things with it. Introducing SafetyNet is a bad idea by Google. Security should be made by algorithms, not by hardware. Using public key anyone may modify anything, and you can still assure the content to be trustworthy. There no need to prove the Android not to be modified, it is just a bad idea, unnecessary restricting the user. Owner.
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Well said
Thanks for the tip! I'll have it mind!
At the moment I don't feel like unlocking the bootloader because I'm planning to use the moto Mods and these can't be used with custom ROMs yet, and I have no use for root other than changing the work mode on Greenify but it already works well enough in No-Root mode, so for me there is no true benefit.
A good resource for lithium batteries are rc helicopter forums. Helis use speed controllers of many tens of amps, drain the batteries in minutes versus days to low levels and charge them at high speed. What reduces their life is heat, overcharging the voltage or over discharging the voltage. They do not age if left in a partial charge. You can let them sit for years unused and they will lose very little capacity. If you only run them at 70%cycle, they last about 3000 cycles.
Well, that was weird.
Phone at 9%, mophie mod at 100%. Put it on, barely used the phone (even took a nap). About an hour later, the mophie mod is at 50%, but the phone actually went down to 8%. Took off the mod and the phone went immediately to 4%. Ouch.
Mod normally works fine. It'll keep the phone at 80% for most of the day just fine. Not sure what was going on.
For the last few years I've been reading that it's best to charge your battery at around 30-40% up to 80 or 85%.
Despite this possibly being the best practice, I don't see much point in paying for a $1200+ with a 4100mah battery and only using 40-50% of it's capacity.
So do you charge at around 10% and then go up to a hundred?
Generally I charge when I need to. I like to be topped up to a 100% when I leave the house. Maybe this isn't best practice. I could wait until it get to about 20% but I am wary about using all the battery cycles up.
PLUS I doubt you're going to get 6-7 out SOT if you charge at around 30 or 40%.
So what do you guys do with your s10e, 10s or s10 +?
Charge it whenever. Why the heck limit myself to 60% (say from 20-80% when even my usage pattern won't cause the battery to wear down to 80% capacity over that same time frame by my charging methods?
I also don't tend to keep my phones for more than a year, so wear level doesn't really affect me much
There is no way to "charge it best". Just use it and charge it when needed.
People take out of date "battery knowledge" from the NiCAD battery days and think that modern batteries develop "memories" and things and that hasn't been the case in decades... Just use it and don't worry about it. A battery is only gonna last 2 years at best anyways, so who cares if you shorten that by 2 months?
I normally charge my S10 from 25% to 90%.
The battery of my previous S7 Edge started suffering after almost a year and a half because I used to always keep it charging overnight.
If you don't intend to keep using your phone for more than a year, then don't limit charging your phone. Even in the case it wears off after a year, you can get your battery replaced by Samsung and start fresh again.
I charge mine around 20-30% all the way to 100% . Then unplugged it whenever I need to.
Is there a good "battery charge limit" app that doesn't require root or Magisk? I used Battery Charge Limit (https://play.google.com/store/apps/details?id=com.slash.batterychargelimit&hl=en_US) and it works great, but requires root privilege. It allows you to set upper and lower limits for charging, so you don't overcharge or let your battery drain.
Batteries don't overcharge. They hit 100% and then trickle charge...
Li-Ion batteries are durable and easy to maintain, you can't overcharge them and also the charging cycles doesn't matter - when you use the integrated Charing electronics in your device. You can charge it for a few minutes over the whole day without losing any capacity. Only over the time the capacity will get lower and lower, but this is an issue you can't avoid.
The charging controller in your device cares about voltage and loading current, never put a current on a Li-Ion battery without current limiter and voltage regulator.
But Li-Ion are very sensitive to mechanical damages and production faults.
Thanks for all the advice guys. Nice to see that most of us feel the same way.
Agree with the others. Technically, for optimum life, they say it's best to be between 40%-80%.
But really, just charge it when you need to charge it. Don't worry about numbers or percentages. If you're only going to own the device for a few years, no matter how you charge your device, it's going to have absolutely no affect on the battery over that time. It'll still be holding almost the same amount of charge in a couple of years regardless of which "charging strategy" you use.
TLDR: don't worry about percentage, charge it when you feel like it or when it needs it.
Go here and follow these principles. End off.
https://www.apple.com/in/batteries/maximizing-performance/
I always stay in the range from 40/50% to 75/80% on my Galaxy Note 8 which I had for 18mos.
Accubattery shows it still has 97% capacity.
https://i.imgur.com/rOabELz.jpg
Neo3D said:
I always stay in the range from 40/50% to 75/80% on my Galaxy Note 8 which I had for 18mos.
Accubattery shows it still has 97% capacity.
https://i.imgur.com/rOabELz.jpg
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so you probably charge ur phone 6 times a day? no thanks
@SquireSCA I believe it's a narrow-minded approach to say that the phone battery will "last 2 years at best anyways, so who cares". I'm currently still rocking my Samsung Galaxy S5 which I bought brand new just over 5 years ago now on it's original battery. The battery is by no means like it was when it was new, but it will still last a day of light usage, and still runs perfectly fine with Android 5 installed. This preservation of the battery comes after years of charging it slowly on a charger outputting less than 1 amp and also making sure it rarely goes below 20%, spending most of it's time between 20%-80%.
If you you want to double your battery life you have to keep your li-ion battery between 3.7V and 4.2V. you have to stop the charge when the battery reach 4.2V so it means you have to keep your battery between 15%-85%.
---------- Post added at 09:24 AM ---------- Previous post was at 09:22 AM ----------
Personally I keep my battery between 15-85% which is sufficient to double it's battery life for a 3-year usage without big losses
Idk i heard ppl saying you should let it completely drain and recharge at least once a month. i charge at 15%. Oh well i only keep this phone for a year and then sell it.
It's mostly BS. There are hundreds of charging theories and no battery experts here so pick one and go with it. Pick the wrong one and instead of getting 8 hours on your batter 2 years down the road you'll probably only get 7.5 hours.