Database Develop

Stock battery "unstable"

so for the short little while, in the span of 5 minutes, i've been trying to gauge the Voltage capacity of the stock battery when at 100%
it has jumped from:
4.118 V
4.162 V
4.123 V
4.166 V
4.170 V
and then back down again...
4.170 V
Can some one confirm how much battery we get when the battery is fully charged at 100%?
i was trying to compare the stock vs the extended battery 4.173 V Li-Ion 1850 mAh
which sits very stable at 4.173 V
info from BatteryWatch App, also Battery Indicator Pro

Sorry, I don't have the link handy, but somebody else on the board posted a detailed explanation as to why that is. It has to do with the way Lithium Ion Polymer batteries work. If they're at 100%, the cathode (or anode, I forget which) corrodes and the battery goes bad much more quickly. So our phone is designed to charge up to 100%, then stop charging. It will let the battery get down to somewhere in the 90's, then start charging again. It lengthens the life of the battery.
If you desperately need the 100%, you can turn off the phone, un-plug and then re-plug the phone into power. Then it will charge back up to 100%.
What I do if I'm going to be away from power for awhile is bring along an external battery pack. I bought a decent one from Best Buy for $50, and it's done a good job. I just ordered an 11,000mAH external battery (http://www.amazon.com/gp/product/B003ZBZ64Q/ref=oss_product) and a double-A charger (http://www.amazon.com/gp/product/B003M9Z5F6/ref=oss_product). That should do me when I'll be away from a plug for awhile...

IDtheTarget said:
Sorry, I don't have the link handy, but somebody else on the board posted a detailed explanation as to why that is. It has to do with the way Lithium Ion Polymer batteries work. If they're at 100%, the cathode (or anode, I forget which) corrodes and the battery goes bad much more quickly. So our phone is designed to charge up to 100%, then stop charging. It will let the battery get down to somewhere in the 90's, then start charging again. It lengthens the life of the battery.
If you desperately need the 100%, you can turn off the phone, un-plug and then re-plug the phone into power. Then it will charge back up to 100%.
What I do if I'm going to be away from power for awhile is bring along an external battery pack. I bought a decent one from Best Buy for $50, and it's done a good job. I just ordered an 11,000mAH external battery (http://www.amazon.com/gp/product/B003ZBZ64Q/ref=oss_product) and a double-A charger (http://www.amazon.com/gp/product/B003M9Z5F6/ref=oss_product). That should do me when I'll be away from a plug for awhile...
Click to expand...
Click to collapse
thanks for that... we don't have the 11000 mah in the UK. Ordered myself a 5000 though ... neat little thing

[OPINION] Do not overcharge battery!

Hi all!
I was browsing through Samsung Galaxy S's Android Development Section when I saw this:
"11. Do NOT overcharge
--Why, when, where: Almost all new batteries have an overcharging protection. This means that the protection that is built into the battery will not let it charge to 100%. This is a feature, not a bug! This will help prolong your battery life while also keeping it safe from overheating/explosion/etc. Do not try to trick it and unplug and plug again until you see 100%, just get used to the fact that you can't have 100% battery anymore and live with it, or you risk destroying your battery."
posted by user "shantzu"
here:http://forum.xda-developers.com/showthread.php?t=939752
I did "calibrate" my battery many times lately by unplugging it when charging and the replugging it. But I sure know I wont do it anymore! It's your choice whether or not you wanna do it!
I just wanted you to know this! Hope I've been helpful!

Cool story bro
Sent from my Dell Streak using XDA Premium App

pgill34 said:
Cool story bro
Sent from my Dell Streak using XDA Premium App
Click to expand...
Click to collapse
+1, blablabla (sorry msg needed to be +10 characters, but it's more now and more and more and more )

eXtink said:
+1, blablabla (sorry msg needed to be +10 characters, but it's more now and more and more and more )
Click to expand...
Click to collapse
I didnt say this. I just quoted and I said that I wont charge my phone to 100% with the plug-unplug way. So if you take my advise do so, if you don't want to take it please stop posting ****!

vladstercr said:
I didnt say this. I just quoted and I said that I wont charge my phone to 100% with the plug-unplug way. So if you take my advise do so, if you don't want to take it please stop posting ****!
Click to expand...
Click to collapse
I dont think he was posting ****. He just wanted to post "+1" (as in "me too"), but needed to respect the minimum character limit for a post.
Badly worded, but it doesnt look like he was making fun of you or anything.
Sent from my Milestone using Tapatalk

I love this thread already
Isn't calibrating the battery all about fixing an Android bug?
Anyway, this reminds me, the Milestone overstates the full charge mV and underestimates the low battery mV.
So, if Battery Monitor Widget reports that I have 4230mV when it's fully charge and plugged in... it's really only 4170mV.
When it's reporting empty at 3200mV, it's really at 3300mV.
http://www.android-hilfe.de/root-ha...ku-infos-ladekurven-leistungsverbraucher.html
Externally measured or indication of the internal voltage measurement
3.30 volts / 3.20 volts
4.12 volts / 4.18 volts
That is, the stone over-estimated the voltage at the battery is full by ~ 60 mV and underestimated the power of up to 100 mV with an empty battery. The intent is well-battery protection (which is good too). It is pretended that 3.0 and 4.2 volts to discharge until it is loaded. In reality, there are more 3.1 volts and 4.15 volts (which by the way of battery manufacturers also better unanimous opinion!).
Click to expand...
Click to collapse
Apparently, we are still protected even if we do calibrate the battery.
I'm pretty sure that Payce at android-hilfe actually took that battery out of his phone so I'll go with that.

Thanks for sharing

Good article

Over charging doesn't effect Lithium Ion batterys;
http://en.wikipedia.org/wiki/Lithium-ion_battery

DannyDroid said:
Over charging doesn't effect Lithium Ion batterys;
http://en.wikipedia.org/wiki/Lithium-ion_battery
Click to expand...
Click to collapse
Gee thank you! I just wanted to start correcting this non-sense. The "overcharging" affects Lithium-Polymer batteries, not Lithium-Ion, so calibrating battery is HARMLESS!!!!
If you have a Samsung Galaxy S then you have this possibility.
I think we can close this thread.

Actually you can overcharge (any) battery, charging it to the higher voltages for higher capacity when used daily (as cell phones).
However it lowers total lifetime of the battery, but you can get more battery time.
But this isn't the cell phones' thing. IMHO charging circuit + circuits in battery won't allow you to do this. So you can't really overcharge.
This "calibrating" is even suggested by notebook manufacturers - you have to do full discharge -> full charge to set the voltage "limits" for 0% and 100%, so the battery indicator can estimate the remaining battery % precisely.
Just few quotations from http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries to support my opinions:
"In terms of optimal longevity, a charge voltage limit of 3.92V/cell works best but the capacity would be low."
"Should I disconnect my laptop from the power grid when not in use? Under normal circumstances this should not be necessary because once the lithium-ion battery is full, a correctly functioning charger will discontinue the charge and will only engage when the battery voltage drops to a low level."
"Partial discharge on Li-ion is fine; there is no memory and the battery does not need periodic full discharge cycles other than to calibrate the fuel gauge on a smart battery."

The milestone has a Lithium-ion polymer battery which looks like they do suffer from over charging.
"It is important to note that trickle charging is not acceptable for lithium batteries; Li-ion chemistry cannot accept an overcharge without causing damage to the cell, possibly plating out lithium metal and becoming hazardous.[5] Most manufacturers claim a maximum and minimum voltage of 4.23 and 3.0 volts per cell. Taking any cell outside these limits can reduce the cell's capacity and ability to deliver full rated current.
Most dedicated lithium polymer chargers use a charge timer for safety; this cuts the charge after a predefined time (typically 90 minutes)."
http://en.wikipedia.org/wiki/Lithium-ion_polymer_battery
Someone will have to dig deeper into the OEM charger to see if it has some sort of cut off.

the thing with timer seems pretty weird to me. Try charging your battery with very little current - why should you cut it off after 90 minutes? Makes no sense to me, but I'm not an engineer so there may be a fact I overlook.
At the same time with noting overcharge will damage battery cell you should point out that there is no way to overcharge the battery without charging the battery CELLS itselves (not whole battery pack with its circuitry) with your custom charger without monitoring voltage/current.
However - yes, you're right, battery cells can be damaged.

I assume it would be the charging unit itself (i.e. the plug) which as the 90min cut off.
Charging via a USB takes ages (supplied at 5V) and without the "plug" it prob wouldn't have a cut off so the chances of over charging would be higher but would require leaving it in for longer.
I'm not sure, I'm only a first year electriton and haven't touched on batterys.

DannyDroid said:
Charging via a USB takes ages (supplied at 5V)
Click to expand...
Click to collapse
The "plug" is just 230V~ -> 5V- transformer so the only difference is current, supplied voltage is the same. Btw I leave my phone in cradle for extended periods of time (24h+) and nothing bad happened. When it's at 100% it stops charging so I don't expect anything to happen.
Same with notebooks - it charges to 100% and stops. E.g. HP does stop charging until battery level drops to 90% so it won't "trickle charge" or do many 99%->100% cycles. Dunno how does the phone charging work, because it says 100% all the time. This can be possibly a bad thing

HTC Sensation XL battery duration?

you're battery experience with this phone?
good,bad?

Very Good!
good use returns me minumum 2 days between charges

is there a diference in custom and stock rom?
im wondering just about battery usage?

Have to charge it every day, but doesnt bother me!
Sent from my HTC Sensation XL with Beats Audio X315e using xda premium

Charger at home and at work, so is plugged in and charging most of the time anyway, but even when i don't bother it'll last the day with moderate use (the signal is awful round here, so it drains it a bit quicker..)

I have a problem with the battery of my new Sensation XL.
When I charge the battery, even after several hours of charging, the maximum charge level reaches 86%, not more. I have just got the phone few days ago and I am trying to get the battery down to zero before I charge it. After the first charge the maximum level of charge was 75%, after the second and third one it was 86%.
Anyone with some idea? Is the battery damaged?
Thanks
Gianpietro

sounds like the wrong battery.
For example, the battery from the standard sensation only charges to 89% cos the voltage is .1v down on what it should be. Many replacement batteris have the same issue, such as the Mugen and Anker ones.
if it's definitely the right one, then it could well be a bad one and need replacing.
what exactly does it say on it?
it should match the XL battery here if it's the right one...
http://forum.xda-developers.com/showpost.php?p=19999792&postcount=16

MinecraftZombi.es said:
sounds like the wrong battery.
For example, the battery from the standard sensation only charges to 89% cos the voltage is .1v down on what it should be. Many replacement batteris have the same issue, such as the Mugen and Anker ones.
if it's definitely the right one, then it could well be a bad one and need replacing.
what exactly does it say on it?
it should match the XL battery here if it's the right one...
http://forum.xda-developers.com/showpost.php?p=19999792&postcount=16
Click to expand...
Click to collapse
This is what is printed in my battery: Rating 3.7 VDC 1520 mAh 5.62 Whr.

that's not the right battery. The XL battery should be a 1600mah 3.8v battery with 6.08 whr.
Seems someone's switched the battery on you.

My bat stays for 2-3 days. including approx 30 min talk per day, approx 1-1,5 h internet usage per day. Mobile data always on. 3 emails syncing every hour. Weather syncing every 3 hours. In standbay phone is consuming 18-22 mA/h. In stand bay 1% is droping every 5-8 hours.
RCMix3d Runny XL v1.2 [Official Sense 3.5 Android 2.3.5]
Stock Kernel
With BinDroid SXL RUNMED2.5 V1.3[KERNEL][17Jan]BinDroid SXL V1.1.1 OC was actualy the same.

gianpietrolorenzi said:
This is what is printed in my battery: Rating 3.7 VDC 1520 mAh 5.62 Whr.
Click to expand...
Click to collapse
1520 mah battery comes with normal sensation......

sachin kundu said:
1520 mah battery comes with normal sensation......
Click to expand...
Click to collapse
That would explain it. Capacity too small and voltage too low.

[Q] lengthen battery condition by limit charge to 90%

keeping battery charge levels between 20-80% will allow your battery to maintain its maximum capacity.
drain the battery to 0% and you might find it dies just that little bit quicker the next day.
likewise, you know when charging the progress slows down around 90-100%? - that's the battery inefficiency around the max mark; this is damaging the battery too.
so, is there an app out there that will stop charging the battery when we get to 90%?
tasker can recognise the battery level but it has no action to stop the charging so presume ably its too low level. its also not available in the secure settings add on.

Do you have any links to back up these claims?
Using GT-I9000 my sent Tapatalk 2 from.

http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries/

Some kernels have these options. Battery life extender, where you can change the maximum charging level. I would guess though that by the time you're really affecting your battery life it will be time to upgrade anyway!

Some kernels have these options. Battery life extender, where you can change the maximum charging level. I would guess though that by the time you're really affecting your battery life it will be time to upgrade anyway!
Click to expand...
Click to collapse
Thanks. I'll look into that. I'd probably leave it at 90% or 95% but 80% is the value I heard. Personnally I find charge doesn't really slow down until 98%.
Mugen batteries can be upto $100 each so I think it's worth protecting the investment and Lithium batteries are the same technology in the brand new Galaxy3 or iPhone4s than it is in a GalaxyS1 etc. So that's my motive.

I experience this too! when my phone are only charged at 90 percent it last more longer !

Battery calibrate.
Sent from my GT-I9000 using xda app-developers app

vinogradska5a said:
Battery calibrate.
Sent from my GT-I9000 using xda app-developers app
Click to expand...
Click to collapse
Does calibration really needa 0-100. 100-0 then charge again from 0-100 (is the phone needs to ne off while charging?)
Sent from my HTC Sensation XE with Beats Audio Z715e using xda app-developers app

Here's a technical explanation for why this kind of app needs to exist (and why I was Googling this charge-limiting idea tonight to find this thread):
jago25_98 brushed the surface of it in an earlier post, but was blown off. He's dead-on. The top 90-100% of a battery's capacity is very slightly damaging to the battery, which likes to stay in the 3.7-4.0V range (about 30% to 90%). 4.0v to 4.1v is about 90 to 100%, and 4.1v to 4.2v is "you can cram in about 5% more at your own risk" territory. The charge lingers around the 100% mark to cram more power in without exceeding 4.2v. This is why devices are shipped half-charged, not full-charged: the batteries are manufactured at a stable mid-range voltage and charge level. Then, they're tested and returned to that half-charged state for storage (!) and shipping. They like to stay in the middle, not the extreme ends (and definitely not fully discharged).
Charge algorithms are designed solely with capacity in mind, because not much care is put into "how long" something will last. They'd much rather abuse the battery and have the battery (or the device) replaced, than to put a larger battery in to make up for lost capacity by charging only to 80%.
For some of us, we understand that, and we'd like to limit our battery charge so the life of the battery (the capacity it will hold over time) will stand up to the test of time. If treated right, these batteries could last over 10 years. Charging to 100% each day and staying there all night (most of the time, it charges within an hour, leaving it sitting about a quarter of its life at a full charge) is pretty destructive, compared to using an app that caps it at 80% each night, saving the full cycles for monthly battery-meter refreshes.
If it can be done, I'd like to know... I might just dust off my SDK and crack open a "how-to" book to get started. About time I had a good app idea...
Here's some recent media that's brought this issue back to be bumped: http://gizmodo.com/you-should-try-to-keep-it-north-of-50-percent-as-much-619313207

Is that extender in NStools?
Sent from my GT-I9000 using xda app-developers app

If I remember correctly Mackay kernel - at least up to 4.3 Mackay - has allowed BLX. I think Semaphore allowed this as well in the manager app.
Sent from my GT-I9300 using Tapatalk

Soryuu said:
If I remember correctly Mackay kernel - at least up to 4.3 Mackay - has allowed BLX. I think Semaphore allowed this as well in the manager app.
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
Yes, I'm using Mackay Kernel+Rom ( 4.4.2 KK ) and you can find the BLX (battery life extender) in Mackay Settings tab.

Sorry for digging up this long submerged thread.
I'm quite interested in the idea of getting my phone to charge between 40-80% while I plug in my phone overnight. I wish to maximise the longevity of the battery on my phone. I'm thinking about using the app "Tasker" together with a Wifi controlled power switch. Has anyone done that?
(PS. I don't use a Galaxy S I9000 phone. Just searched and found this randomly)

FalconFour said:
Here's a technical explanation for why this kind of app needs to exist (and why I was Googling this charge-limiting idea tonight to find this thread):
jago25_98 brushed the surface of it in an earlier post, but was blown off. He's dead-on. The top 90-100% of a battery's capacity is very slightly damaging to the battery, which likes to stay in the 3.7-4.0V range (about 30% to 90%). 4.0v to 4.1v is about 90 to 100%, and 4.1v to 4.2v is "you can cram in about 5% more at your own risk" territory. The charge lingers around the 100% mark to cram more power in without exceeding 4.2v. This is why devices are shipped half-charged, not full-charged: the batteries are manufactured at a stable mid-range voltage and charge level. Then, they're tested and returned to that half-charged state for storage (!) and shipping. They like to stay in the middle, not the extreme ends (and definitely not fully discharged).
Charge algorithms are designed solely with capacity in mind, because not much care is put into "how long" something will last. They'd much rather abuse the battery and have the battery (or the device) replaced, than to put a larger battery in to make up for lost capacity by charging only to 80%.
For some of us, we understand that, and we'd like to limit our battery charge so the life of the battery (the capacity it will hold over time) will stand up to the test of time. If treated right, these batteries could last over 10 years. Charging to 100% each day and staying there all night (most of the time, it charges within an hour, leaving it sitting about a quarter of its life at a full charge) is pretty destructive, compared to using an app that caps it at 80% each night, saving the full cycles for monthly battery-meter refreshes.
If it can be done, I'd like to know... I might just dust off my SDK and crack open a "how-to" book to get started. About time I had a good app idea...
Here's some recent media that's brought this issue back to be bumped: http://gizmodo.com/you-should-try-to-keep-it-north-of-50-percent-as-much-619313207
Click to expand...
Click to collapse
I am thinking, if Android app can't limit battery charging level, at least there should be an app that shows some sort of notifications when charging has reached a certain level set by users.

There is an app for it. Battery Charge Limit.
jago25_98 said:
keeping battery charge levels between 20-80% will allow your battery to maintain its maximum capacity.
drain the battery to 0% and you might find it dies just that little bit quicker the next day.
likewise, you know when charging the progress slows down around 90-100%? - that's the battery inefficiency around the max mark; this is damaging the battery too.
so, is there an app out there that will stop charging the battery when we get to 90%?
tasker can recognise the battery level but it has no action to stop the charging so presume ably its too low level. its also not available in the secure settings add on.
Click to expand...
Click to collapse
You can get this app https://forum.xda-developers.com/android/apps-games/root-battery-charge-limit-t3557002 here. It also has tasker integration

Incredible S Battery/Charging Issue

Hey guys
I have an HTC Incredible S which doesn't want to charge. I thought it was a problem with the charging port as it felt loose so I went and got a universal battery charger to charge the battery. However the battery will not charge using this charger. At this point I am thinking that the battery has failed and wish to test it. I also have a HTC Sensation, now the battery from the Sensation will not fit as they are completely different sizes, so I am planning to wire the Sensation battery up to the Incredible S just to test to see if it will power on.
My question is, will this damage the Incredible S or the battery? If the phone powers on and works it means I simply have to grab a new battery for the Incredible S and away I go. I had a quick look at from what I could gather the voltage is the same however I would rather someone confirm this. I understand the mah are different but this only effects the amount of charge not the strength?
I should note that the Incredible S has gone swimming about a year ago and while it dried out and worked fine, it could have finally corroded and died.
Thanks

Buy a battery and test.
Press thanks if I helped you out!

when i unplug my charger my battery percentage jumps from 100 to 94 what can i do????

shmetal said:
when i unplug my charger my battery percentage jumps from 100 to 94 what can i do????
Click to expand...
Click to collapse
Thats pretty much every Incredible S. Unless you dont wanna go through multiple charging cycles (charge full, unplug, plug till charge full, and reapeat) then i would suggest just leave as is cuz as u might be aware the more u charge things, the shorter the battery life gets.

Anaraith said:
I also have a HTC Sensation, now the battery from the Sensation will not fit as they are completely different sizes, so I am planning to wire the Sensation battery up to the Incredible S just to test to see if it will power on.
Click to expand...
Click to collapse
I would be nervous to do that, but I suppose if you look at the back of the batteries, and all the stats are the same, I don't see how it would hurt. Still wouldn't want to do that on my own phone, though.