Database Develop

first 25% of battery drops fast?

Ok so this is what i noticed has been happening with my phone...
I wake up in the morning and i unplug my phone from charger at 100% battery life...
after about 1-2 hours of no use (outside of occasional check of time) and no programs running i notice that 25% of life has diminished...
i have turned 3g off and done most of the kaiser tweak settings that help with battery life. for the rest of teh day i can use the phone and battery life runs normally but it seems the first 25 to 30% drops real fast without use
is everyone experiencing this? is it normal?
KP

The problem lies in your first sentence. "I wake up in the morning and unplug my battery." You are charging your battery too much thus killing it's battery life. I only charge my phone in the day while I'm at work. That way I can unhook it when it's fully charge. I would go on ebay and type in OEM battery Kaiser. You can pick one up for 15-30 dollars new.

From what I understand. Leaving your battery in the charger when it is fully charged should not damage the battery as long as its not there for an excessive amount of time but i might be wrong. Either way i have no way of charging the phone during the day as im on the go most of the time so this would mean even if i get a new battery it wont matter because it wile eventually do the same as i have only used this phone for about 3 or 4 months now. any other possibilities or solutions?
or should i just take it as it is and just buy a new battery maybe a bigger seido?

I thought Lithium ion batteries have overcharge protection. I charge mine overnight which I am sure a lot of others do also with no negative effects.

netboy said:
I thought Lithium ion batteries have overcharge protection. I charge mine overnight which I am sure a lot of others do also with no negative effects.
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I do... Maybe I shouldn't?

I would hope it has Overcharge Protection!!!
With NiCad Batteries if you overcharged them you would kill the life of the batteries.
And while all batteries do this LiIon are least tolerant. If you overcharge a LiIon battery, that is without Overcharge protection, the LiIon Battery with BURST INTO FLAMES! Thus the problem with the Sony Batteries that caused all those Laptop battery recalls.

gqstatus0685 said:
You are charging your battery too much thus killing it's battery life.
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Thats total BS with lithium batteries.
To the OP: Try running down your battery completely once, until the phone switches off by itself, then recharge fully. If you never do it and always recharge before the battery is empty the battery's power meter can lose its calibration over time and display weird things.
If it doesn't help, and you can notice a drop in overall life time you might need a new battery.

I have the exact same "problem" with my Tytn II.
Is slows down evenly though. (So the first 5 % of battery vanishes in minutes basically while the last 5 % can last for an hour, when it's half full % will last somehwere in between these two extremes).
Personally I've just interpreted this as poor measuring done by the hardware and/or software. (Ie I don't think the battery performs better the less full it gets as the meter in Windows would have me think)

kilrah said:
Thats total BS with lithium batteries.
To the OP: Try running down your battery completely once, until the phone switches off by itself, then recharge fully. If you never do it and always recharge before the battery is empty the battery's power meter can lose its calibration over time and display weird things.
If it doesn't help, and you can notice a drop in overall life time you might need a new battery.[/QUOTE
thanks ill try it out as soon as i get a chance...
kp
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may seem a daft point but after draining the battery, dont charge with the phone turned back on. gives a fuller charge cos its not being used and makes it quicker to charge, lol

duke0102 said:
may seem a daft point but after draining the battery, dont charge with the phone turned back on. gives a fuller charge cos its not being used and makes it quicker to charge, lol
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Hmm...I don't see how turning my phone off to charge would increase the charging rate dramatically. My phone in standby mode uses 1% every 2 hours.

depends highly on roms and especially on radios.
with a crappy rom, battery could drop as fast as 10% per hour.
with a decent rom, battery drops in standby mode at a rate about 2% per hour.

duke0102 said:
may seem a daft point but after draining the battery, dont charge with the phone turned back on. gives a fuller charge cos its not being used and makes it quicker to charge, lol
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If the phone is on but on standby that barely changes a thing. If it's on, with display illuminated then yes it might take you an extra 20 minutes to charge.. no big deal either.

*UPDATE*
ok so i drained my battery last night completely(turned on navizon, tt7, and skyfire) which took me about at most 2 hours.
Put it in for a charge
woke up at 9 and checked to see and it was 100%
I have push mail set to update every hour and i also run pocket sportscenter autoupdates which updates every 10 to 15 minutes
I used the phone for 5 minutes of calls
5 minutes of web surfing
a few text messages
and the occasional time check
at 6:30 pm battery life was at an amazing 90%
i was thrilled.
i continued to surf the web heavily from 730 to 8
a few more text messages
at 9 battery was at 67%
so i gotta believe that draining the battery helped recalibrate it...
i guess every 2 or 3 months i got to drain it out and give a full charge
thanks for the help guys
really appreciate it

Poor Battery Performance

I have had my Galaxy S for a bit over a week now and am pretty disappointed with the battery performance. Most days I take my battery off the charger at 7am and it reaches 15% low battery warning by 1-2pm. I do spend a fair amount of time reading XDA and listening to music. I'm currently running Stock JM1 firmware with no lagfixes.
Here's a list of my apps that I have installed:
http://www.appbrain.com/user/Lokhor/apps-on-the-samsung-galaxy-s
I am running JuiceDefender which I thought would make a big difference and does not. I have also set Tasker to change the Brightness level to 20 (below the safety threshold) when the battery reaches 50% or below, otherwise the brightness is at the minimum (30%).
I have heard that you need to condition the battery so I have been trying to do this but it doesn't seem to have had much effect. Today I used my phone only casually and it's currently at 22% after 12.5 hours. The battery use details show the following:
Display at 56% being on for 2h22m and 13s.
Cell Standby 18% Time on 9h21m, time without signal 13%
Phone Idle 7% Time on 7h33m
Android System 5% CPU usage 23m39s CPU foreground 24s
Android OS 3% CPU Usage 13m 27s
Is this normal? Is there anything I'm doing wrong?
Please help

I don't know what others are telling you about conditioning a LiIon battery but you don't have to. LiIon batteries don't suffer from what NiCad do. Some do suggest wearing the battery down to nil and then charging it up again. However, this is pretty bad for the battery and should not be done more than once every 30 cycles. With every LiIon battery I've ever owned I've either trickle charged it or charged it when it wasn't too low and they've all lasted over 3 years. I've never conditioned one.
Anyway, my advice to you is to see how long your battery lasts in standby. Mine could probably last 3 days or more if I don't bother it too much (with sync, wifi and all that good stuff). I find the worst contender for battery drain is the display. The only problem I see with your stats there is that I've played Asphalt5 for around an hour and a half which is quite heavy on juice and it only drains roughly 10%-15%. Then again you're browsing the web so maybe probably worse.

Oh, and when charging your phone, don't use the USB hooked up to a computer as it doesn't stop charging when it's full. Use the wall charger to charge.

no need to worry more
just get this http://forum.xda-developers.com/showthread.php?t=733705
lokhor said:
I have had my Galaxy S for a bit over a week now and am pretty disappointed with the battery performance. Most days I take my battery off the charger at 7am and it reaches 15% low battery warning by 1-2pm. I do spend a fair amount of time reading XDA and listening to music. I'm currently running Stock JM1 firmware with no lagfixes.
Here's a list of my apps that I have installed:
http://www.appbrain.com/user/Lokhor/apps-on-the-samsung-galaxy-s
I am running JuiceDefender which I thought would make a big difference and does not. I have also set Tasker to change the Brightness level to 20 (below the safety threshold) when the battery reaches 50% or below, otherwise the brightness is at the minimum (30%).
I have heard that you need to condition the battery so I have been trying to do this but it doesn't seem to have had much effect. Today I used my phone only casually and it's currently at 22% after 12.5 hours. The battery use details show the following:
Display at 56% being on for 2h22m and 13s.
Cell Standby 18% Time on 9h21m, time without signal 13%
Phone Idle 7% Time on 7h33m
Android System 5% CPU usage 23m39s CPU foreground 24s
Android OS 3% CPU Usage 13m 27s
Is this normal? Is there anything I'm doing wrong?
Please help
Click to expand...
Click to collapse

I found that charging it whenever it was convenient instead of when it was low would result in a charge that lasted ~24 hours.
I've noticed significant increase in battery life since I started waiting for the 15% charge warning, plugging it in till it was full and then unplugging it. I get 2-3 days of use this way.
I also set my email to only sync between 6 AM and 11 PM. I believe this helps a lot as well.

since we are about this topic, check this out
How to spot fake battery vs. OEM battery: http://forum.xda-developers.com/showthread.php?p=7953322

so if I'm listening to music during the day at work should I have my phone plugged into the wall charger or just let the battery run down?
Last night I took the charger off at midnight when it was full and when I woke up it had only dropped 5%. After reading my emails quickly it was at 93%.

it works fine either way
read this
http://forum.xda-developers.com/showthread.php?t=769208

I find leaving the brightness on automatic uses up loads of battery. Setting it to lowest seems to make the phone last 24hrs+
I also found that having beautiful widgets clock/weather installed used up a lot of battery for some reason.

I don't use weather because it has to sync every so often to update it which to me is a waste...I'll just look outside. I also leave brightness on the lowest setting wherever I am as the screen is already very bright (why waste battery?).

My experiences with my SGS have taught me to be conservative with its battery. Anytime you turn the screen on, you eat power like crazy. The best bet is to just top her off whenever the need arises. Personally, I have found that I'm fine just topping her off in the car when I'm driving, so that I start my work day at high 90's, and especially once I've got my morning browsing out of the way, I don't eat a big chunk of battery at any other time.
But yes, if you find you are running low, you can happily just take a half hour to charge from a USB port to give you an extra boost. Alternatively, spare batteries and so forth do the same thing, although it can be annoying if you don't have a charger that will do the phone and a spare battery at once.

im experimenting with apndroid now to turn of 3g then i dont specifacly need it. It comes with an on/off widget. Looks promising so far. 40% at 2300 hour and then i have used wifi a bit, played angry birds and talked for about 2 hours in total.

Phone Died at 50% Power.

Here I was, just using BlinkFeed, doing a bit of web browsing... I didn't have the battery's state in my mind, as I saw a half-full icon on the top right. Suddenly, beep, scrolly animation, cutoff. What? I rebooted the phone while tethered to power after waiting for the blinking orange LED to glow steady, and opened my task manager app, which also tracks battery life. It had died at around 50%. I've read other threads of people's battery things being ill-calibrated and missing 10-20%... but 50%? Really?
But then again, I haven't normally been charging the device fully. The same task manager reports 100% power being 4.3 volts, and I've read that 4.3 volts on a li-poly chemistry reduces its useful life by 50% when compared to 4.2 volts, so I've typically been charging to 80-85%. But I've had this happen several times, and I do charge to 100% after it does happen. I wouldn't think that 5-10 incomplete charge cycles like this would be enough to throw the gauge off so drastically.
This, in addition to the perpetual-suiciding problem my phone has had since the second-to-most-recent minor OTA Sprint update...

Wipe battery stats?
Sent from my HTCONE using xda premium

flyboy21141 said:
Here I was, just using BlinkFeed, doing a bit of web browsing... I didn't have the battery's state in my mind, as I saw a half-full icon on the top right. Suddenly, beep, scrolly animation, cutoff. What? I rebooted the phone while tethered to power after waiting for the blinking orange LED to glow steady, and opened my task manager app, which also tracks battery life. It had died at around 50%. I've read other threads of people's battery things being ill-calibrated and missing 10-20%... but 50%? Really?
But then again, I haven't normally been charging the device fully. The same task manager reports 100% power being 4.3 volts, and I've read that 4.3 volts on a li-poly chemistry reduces its useful life by 50% when compared to 4.2 volts, so I've typically been charging to 80-85%. But I've had this happen several times, and I do charge to 100% after it does happen. I wouldn't think that 5-10 incomplete charge cycles like this would be enough to throw the gauge off so drastically.
This, in addition to the perpetual-suiciding problem my phone has had since the second-to-most-recent minor OTA Sprint update...
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The battery stats have nothing to do with battery life. They are just statistics used to diagnose. Lithium ion batteries also do not have a memory and don't really need calibrating. The type of issue you are having stems from one of two things; Bad charger or bad batter. Bad batter would most likely be something straight from the mfr. Bad charger would be obvious. Try using the standard HTC charger in a wall outlet only for a few days or a week and see if it happens again. Sometimes this could be a one time thing meaning what I call a "bad charge." It will go away after a "good charge." Just eliminate variables by using the same charger in the wall every time and charge for the same amount of time and if the problem goes away in a week then you have your answer : )
Btw i'm a long time Sprint tech and I specialize in battery life. Just in case you need educated advice.

After the phone-death that I captured above, I charged the device to 100%, and then left it to drain until death again. It lasted about two days with very light use, dying when it reported 10%, again with zero warning other than the ~15% low battery indication. I know that deep-cycling these batteries isn't healthy for them, but it seems to me that the cycle helped a bit.
However, I do still feel concern about the reported full-charge voltage, ~4.3 volts. Does such a voltage not severely reduce the number of cycles the battery can go through in its lifetime? Also, what is supposed to be the cutoff voltage for this battery chemistry? I thought it could go down to ~3.0 volts? My phone seems to be cutting off at a reported 3.5 volts.
That, and my perpetual-suiciding problem. Though, I'm about to encounter a change of scenery that will take me downtown, so I'll hold off on complaining more about that until I see whether or not the signal strength influences that.

[Q] Just bought my Moto X. Question about the first time charge.

So, the salesperson told me to fully use the current charge on the phone and then told me to charge it for 6 hours straight.
Now the 30% battery it had lasted for quite a while I fully discharged it, it turned off on its own.
Now it's been charging for 3 hours and it's already full. Should I leave it for the full 6 hours? or can I use it now?
I'm a bit anxious but I can wait if its better for the phone.
Thanks :laugh:

You're gonna get different answers with no scientific backing.
So here's the first: just do an extra 45 mins to an hour after it reaches 100%.
If you click the link in my sig and scroll to the bottom of that post you'll see my battery life which, is pretty decent.

Thanks
scorpion667 said:
You're gonna get different answers with no scientific backing.
So here's the first: just do an extra 45 mins to an hour after it reaches 100%.
If you click the link in my sig and scroll to the bottom of that post you'll see my battery life which, is pretty decent.
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Click to collapse
Thanks man

This is sheer non sense. Once the phone reaches 100 percent, the kernel cuts off the charging . What use would it be by charging it for another 45 hrs?

DaRkRhiNe said:
This is sheer non sense. Once the phone reaches 100 percent, the kernel cuts off the charging . What use would it be by charging it for another 45 hrs?
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I second this. Charging batteries had specific charging instructions years ago, that no longer holds true. Just charge the phone and use it. it's not that big a deal.

It's just for calibrating the battery.
Let me just get this out of the way: most of the time it doesn't make a difference.
The only time it could (not always) make a difference is one of the following scenarios:
-phone sat for a long time while turned off (i.e before you purchase it)
-you hooked up your phone to the charger many times throughout one day and didn't allow it to hit 98-100% before you unplugged.
The battery has a chip built in [most lithium ion batteries have this because they are A) explosive and B) can kill you] which is responsable for a few things:
-"guessing" your current battery percentage based on the minimum and maximum recorded voltage value. For example let's assume a phone with a 5v battery shuts off at 3v. When that battery reaches 4v it will display 50% battery left.
-deciding what the shutoff voltage is. What I mean by this is let's say for example when your 5v battery reaches 3v at the end of the day, the chip decides it's time to shut off the phone and prompt you to charge it back to 5v
-constantly reading the the voltage in order to use that data to perform the decisions listed above
The voltage sensors in phones are, well, pretty bad due to the inherent space and power limitations. The voltage values swing back and forth between different values that are (sometimes) close to the actual value the battery is at. So the battery chip has to calculate an average based on all these voltage values. It then uses that data to do it's job, which is shutting down your phone when it needs to as well as display battery percentage.
So by leaving the phone in for a little longer after 100% once in a while, all you're doing is allowing the battery chip to collect more voltage readings in order to calculate the average more accurately. You're just doing it for the sake of sample size.
Realistically unless your battery is not calibrated, it doesn't really make a difference. But a phone that just came out of a sealed box is likely to need calibration depending on the manufacture date, or how long it "sat" for.

DaRkRhiNe said:
This is sheer non sense. Once the phone reaches 100 percent, the kernel cuts off the charging . What use would it be by charging it for another 45 hrs?
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It may cut off charging..
But on my X (Dev for Verizon, stock and rooted), even after reaching 100%, the battery symbol still continues to show the "lightning bolt"/charging symbol. If I leave it connected to my Anker Astro 3, it continues to draw power until I unplug it.
@MrEndless, I agree with DaRkRhiNe and scorpion667. You're never going to get a straight answer.
Me, I ran mine down until the phone shut itself off, then charged it up to 100% and left it go over night and took it off the charger in the morning.
Once every few weeks, i do the same. Run it down until it shuts off and then put it on the charger and let it go until its been at 100% for a while. I never really say "xx minutes" or "xx hours" after 100%. It just depends on how long before I have to leave the house.

Question Pixel 7 not charging all the way up

my new pixel 7 does not charge all the way up during the night, it usually stops at 40-50%
I'm using a 5v 2A charger and high quality cable (already tried swapping them ).
Do you think it could be an hardware default ?

Power if off and charge.
If it still shows 50% charge return it.
Not acceptable, especially if the actual SOT reflects that.

Nytronx said:
my new pixel 7 does not charge all the way up during the night, it usually stops at 40-50%
I'm using a 5v 2A charger and high quality cable (already tried swapping them ).
Do you think it could be an hardware default ?
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Click to collapse
Did you try turning off adaptive charging?

hi
turn off the adaptive charging

I would return it immediately before you pass the window. I wanted to return mine for fingerprint reader issues, but I waited too long and now my only option is to swap it for a refurb device which is less than ideal.

Thats a good thing. Charging the battery to 100% stresses the battery, as does completely discharging it and reduces the longevity of the battery. I have mine set by ACCA to only charge to 90% and turn off at 5%.

gorilla p said:
Thats a good thing. Charging the battery to 100% stresses the battery, as does completely discharging it and reduces the longevity of the battery. I have mine set by ACCA to only charge to 90% and turn off at 5%.
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Bump that low to at least 20% especially if you fast charge. It's the higher current load/temperature at the first 20% that causes the stress. It's important the battery is at least 72F at charge start, preferably 82-90F to avoid Li plating which will permanently degrade the cell if it occurs.
I aim for 40-80% usage range. That said on this heavily used device I expect about a 1.5 year battery life. Replacing batteries is just part of routine maintenance, no big deal.
While I always fast charge however I do midrange power cycling, what Li's prefer; it's less stressful. I'll frequently do 20% amounts too. What's convenient for me at the time. Rarely go above 90% as it's rather pointless and disproportionally increases charging time vs usage time.

Yeah, my current setup isnt perfect, but it avoids the extreme stresses while still offering me a charge for a full day.
However, my phones have only ever seen a 5% shutdown on a few occasions so there is no need to set a hard cutoff at 20%. It rarely gets that low and if it does, its because I cant charge it.
Typically I charge it in the car on way home from work, then when I go to bed. So the cycle throughout the day still is pretty ideal.
90->40%->65%->40%->90%

gorilla p said:
Yeah, my current setup isnt perfect, but it avoids the extreme stresses while still offering me a charge for a full day.
However, my phones have only ever seen a 5% shutdown on a few occasions so there is no need to set a hard cutoff at 20%. It rarely gets that low and if it does, its because I cant charge it.
Typically I charge it in the car on way home from work, then when I go to bed. So the cycle throughout the day still is pretty ideal.
90->40%->65%->40%->90%
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If you resign yourself to changing out the battery when it's degraded (80% of its original capacity) it's not a big deal.
A battery failure is a big deal though; one I had came close to damaging the display on my N10+. That battery was degraded, lasted less then 1.5 years. I got lucky that time... not going to push my luck again especially over a cheap repair like a battery replacement.