Develop Bugs

[Q] Instant discharge.

So, I'm on my Evo today, playing a game (Air Strike). My battery is at 93% when I picked the phone up to play, and the phone is plugged in. Suddenly, with no warning what-so-ever, my phone shuts off. Of course a mini-freak out and many "wtf's" ensue. No warning, no signs, even the led went off. I pulled the battery, put it back, then plugged the phone in again. After that it gave me the blinking light indicating the battery was too low to turn on. After a few minutes charging she came back on and battery was at 5%.
How the hell does a battery go from 93% to 0% in less than 5 minutes, and give no warning at all?? Anybody else ever have this problem?

Wow I've have never heard or that happening before. Maybe a glitch in the battery stash? Did it take awhile to charge up to 100%? Can you reproduce the issue again?
Sent from my EVO (CM 6.1.1) using XDA App

I had this problem with my older phone once. The battery itself may have a problem or your phone is not getting charged properly.
Try These :
1) Try charging the phone overnite from the Wall charger (Not through USB of your computer)
2) If the above does not work, and you have access to another evo battery, then try using that.(try using a friends battery and charger for a day. ) (Ofcourse needless to say the charger and battery must be for Evoonly )
In my case, my phone started working fine again after getting my battery & charger replaced.

Probably shouldn't worry about it too much just yet. Could be something as simple as your battery meter was mis-calibrated. The meter itself is software so it can easily be wrong/off. If it continues you may have a bad battery.

Sounds to me like something is wrong. Did you just get the phone or have you had it?

Idk... The phone had been plugged in for most of the day (hadn't gone anywhere. Lazy day lol) And like I said, the led went completely out as well.
Haven't had the problem again, so we'll see I guess....

Mark_Hardware said:
Idk... The phone had been plugged in for most of the day (hadn't gone anywhere. Lazy day lol) And like I said, the led went completely out as well.
Haven't had the problem again, so we'll see I guess....
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I've seen some posts about the Evo battery shutting off the charge when its being used. Were you using your Evo while it was charging?
If the battery doesn't seem to be giving you percentages that are accurate, you might want to recalibrate your battery.
Common misconceptions sticky (Evo Q&A) said:
Battery recalibration (Thanks to Cyanogen for this and to fachadick for bringing it to my attention).
If you're experiencing higher than normal battery drain, try the following:
1. Charge the phone to full battery; let it keep charging until the battery says it is fully charged. Do not just wait until the light is green, it isn't always fully charged, causing a lot of inaccuracies. (You can check by going to: Settings -> About Phone -> Status -> Battery Level = Full.)
2. Boot to recovery and wipe battery stats.
(To have the most accurate of battery stats, reboot the phone immediately after wiping the battery stats and wait for your ROM to boot completely to the desktop. Once your entire boot is done and you have full access to the phone, go ahead and pull the charger and continue.)
3. Do not charge the phone until after draining the battery completely, resulting in it automatically shutting off. Take out the battery, and keep trying to turn on your phone until it will not turn back on at all.
4. Recharge the phone completely and then use as you normally would.
This is a method that has been proven to work, I am sure there are other ways. My battery lasts longer after doing this and the reading is much more accurate. It might be advisable to do this after every ROM install if you want the most battery life and most accurate battery reading by the phone's software.
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Bought extended battery today how to set up phone?

I was wondering how i would set up my phone. Reset batt stats, longer charge times or something on how to get the best out of the extended 3500 battery. Also any hints or advice?

i have the same one and i just cleared the stats after charging the battery till full.

Sorry bad post delete please. This message just this one lol.

How do I know its full. ? Just over charge it with it on or off?. That's what u wanted to know. And does the percentage become accurate after doing this?. As I understand right now it should only register at 1500 right until the batvstats are chnage and then registers as 3500. And should display % based on that
Sent from my PC36100 using XDA App

i let mine charge until the green light was on, then unplugged and waited for the light to go out and re plugged did that a couple times until light is orange and charged till it was green again. havent had any problems.(knock on wood)

Do you know how long it took for that process? im getting it green now and will do the rest tonight with it being off. I am hoping that it registers the full battery capacity.

I've had very good luck with a $7 Chinese 3500mah from Amazon. I reset my stats through my battery widget but not until weeks after I had the battery. I don't think I was rooted when I first bought it.
The first day I got it I installed it and it showed 66%. I ran it down to 0% which took a pretty long time. Supposedly that's important, several cycles of complete discharge.
I have this docking station that is absolutely worthless as a docking station, but pretty awesome as an external battery charger. I use that to charge it, and sometimes charge it while its in the phone with the stock wall charger. The phone recognizes the %'s pretty close. At first it would drop to 80ish% pretty fast and then be really long between 50-80. Now it seems pretty steady all the way through.

Hmm I never thought to run down a Li-Ion battery due to it not actually having a memory.. Well i got it fully charged and I will see how long it takes to run down.
So I am waiting on how things will go for it lol. Thanks for the help guys. If anyone else has anything else feel free to chip in.

Get the battery monitor widget int he market, go into the settings and make sure you set it for the maH that your battery is, and then try the guide in my signature.

I have had my extended battery for some time now. I don't have BMW and have no history out my battery on my phone. All I did was put the extended battery in, played with the phone like crazy, killed the battery all the way, kept the phone off and charged it until 1 hour after the LED turned green. No issues.
Sent from my PC36100 using XDA App

hxxp://i.imgur.com/uZEc4.png
I'm in the middle of a record setting run right now. This is very unusual. Usually I get 16-24 hours. My battery and EVO seem to have a mind of their own. But when it works it works good. I still struggle with intermittent 'android system' battery problems.

Bad battery, wake issue or usb port/cable?

So after some time I've been battling with my battery life through the day. Few months back it was great, Id easily get a day no problem! Then I found I had a wakelock issue and had that fixed.
I now suddenly have almost multiple things going on at once but first a small back story.
Went to bed one night and had it plugged into the wall. Went to bed at 60% and woke up and my phone was down to 6%. I thought, well the usb port is bad or the cable. Took it into the sprint store, they of course say "it looks like its charging just fine, the light is coming on" (the light was on during the night too).
They checked the battery and they said it was bad. Im wanting to take it to another store and have them check, because either: they didnt want to replace me with a new phone or replace the usb port if thats bad.
1) Bad battery- in a matter of 30minutes (during my lunch break at work) my battery dropped from 63% to 14%- only used 3g for facebook and sent 2 text messages. And my phone is undervolted and underclocked
2) Possible bad usb port- I plug my phone in all day at work, and 90% of the time the screen is off. The % of the battery doesnt increase, but maybe decreases slightly (I have data and everything turned off while at work because I get no data signal).
3) wakelock- so suddenly I'm getting a huge percentage of system usage of 54% in my battery stats. A few months back it was maybe 1%? I flashed the .img that sets the wimax, PRI, NV, etc to what fixed the issue back then. Im just confused how this has come back now when I havent even updated anything related only my rom (MIUI 1.8.26).
So I've ordered 2 2000mah batteries off ebay- I wasnt going to pay $40 from a battery story across from the sprint store (as they didnt have any stock, only extended batteries).
If anyone has had a similar experience, or would know what is the culprit would love to get feedback. Hopefully I can get this fixed soon. Maybe just a trial and error.

Something really strange just happened. I checked my phone just now and the battery is at 98% and just maybe 30minutes earlier it shut off because of low battery
What I explained before about using my phone on my lunch break was only 2 hours ago and showed 16%.
I always wipe my battery states when I update my ROM or install a new kernal.

tlxxxsracer said:
Something really strange just happened. I checked my phone just now and the battery is at 98% and just maybe 30minutes earlier it shut off because of low battery
What I explained before about using my phone on my lunch break was only 2 hours ago and showed 16%.
I always wipe my battery states when I update my ROM or install a new kernal.
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Don't wipe battery stats if you don't have a full battery, it'll keep your battery from charging fully.
It may be the battery, but since you're getting new batteries you'll know then. If you didn't get an external charger, I'd suggest doing so. That way you can guarantee that your extended batteries get a full charge, and you can switch out a dead battery with a fully charged one if you keep having problems. The usb port on the Evo is crappy anyway, but if the light comes on and stays on & you can transfer data through the usb port then I doubt that's the problem.
It could be hardware failure, but wait until you get a new battery and have properly calibrated to come to that conclusion.
In the meantime download Battery Monitor Widget, that should show you your true battery capacity even if the system will not. You don't have to use the widget, you can just open the app. Once you see that your battery is fully charged, calibrate your battery properly. Wipe battery stats at 100%, let it drain until it shuts off, charge to 100% without breaks, and you should be good to go.
Good luck!
Sent from my PC36100 using Tapatalk

Thanks for that!
I just bought a battery from BB to hold me over (50$ for a 1750mah battery?! )
when it charges to 100%, should I go into recovery, or use battery calibrator (app)?
Ill install that battery monitor too

BMW has the feature to wipe stats. I also recomend to look at the reports and judge when the battery is full by looking at mV. 4200mV is full charge. Then wipe stats FIRST, then unplug and run down completely, then recharge fully with out unplugging.
Sent from my PC36100 using XDA App

Ya just noticed BMW had that feature. Forgot I had a menu button. LOL!
This battery I got at BB is a "1750mah".
You know what I realized what might be the issue? Back a few weeks ago, I bought an extended battery to use to take videos at a concert. At that point I wiped the battery stats at 100% of the 2500mah or so battery..

[Q] Battery Not Charging Completely

I just purchased a used Galaxy S3 and have had it for a couple of days already. This is what my normal charging routine is with any phone I have owned:
I shut the phone off before I go to sleep at night (usually around 11:00 pm) and plug it in. I'll get up at 6:00 am, unplug it and turn it back on. I've noticed though that with my new phone for the past 2 mornings, the red LED light is still on when I unplug it and when I turn the phone on, I immediately check the battery status and it has only charged as high as 92%. I am using the original wall plug (5V-1A) but the usb cable is not original. I also tried using 2 different ones with the same results. I'm just wondering what the problem could be and if anyone else has had this issue and what they have done to correct it? Thanks...

Try to reset the battery in CMW

Sorry, I should have also mentioned that the phone is bone stock for now...

Soooo, last night I tried a third micro usb cable and I drained the battery all the way down to the point where the phone shut itself off. I then plugged it in for the night and the charging light was finally green this morning. However when I turned the phone on, the percentage still only showed that it was at 92%. I'm not sure what else to try and who knows, could the battery be borked?

How long does the battery last? Just because the battery meter says 92% doesn't mean its not full, it could just be calibrated incorrectly. Put another way, as far as the OS know 92% is as far as the battery charges even thought the battery is at maximum capacity. Unfortunately im not sure if there is way to reset the battery meter without root access.

Yesterday the battery lasted a little over 16 hrs. That's with mobile data shut off, gps off, bluetooth off and pretty much everything else. I sent a hand full of texts, around 3 hours of wifi usage and about an hour of music. I can't really think of anything else I used it for...

If you are getting 16 hours on a stock battery there isn't anything wrong with it :good:. If the calibration of the battery meter bugs you enough you can always root it and reset the battery stats, either from CWM recovery or with a capable app. I have SD Maid which can do this with root access, but im not sure if the feature is available in the free version. Im sure there are other apps on the market that can do this as well, possibly free ones, but im almost certain they will require root to do so. If you do, charger the battery overnight to ensure a full charge, if possible use a usb power source instead of the wall adapter. This is a slower charge and actually can achieve a fuller battery charge. As soon as you remove the phone from the charger reset the stats and let it run down to nearly dead, i would probably do this twice to give the battery meter a good high/low limit.

Thanks! I will try this once I've exhausted all other possibilities that may be causing this. It does bother me a bit I'm not sure why. Maybe my OCD kicking in lol! I've just pulled the back cover off and the battery in it is 3.8V and 7.98Wh. The model number of it I believe is GB/T18287-2000 and below that it also shows 4.35V. Can anyone confirm if this is even the correct battery in it for this phone? Thanks...

That is the correct voltage and wattage....so yes it is the correct battery.

Thank you...

So another morning went by with the same issue and i figured i had to try something else. I went into The Source after work and went ahead and purchased the extra battery kit they sell (comes with the battery and a battery charger/stand) making sure that i could return it if it turned out that it didnt solve my problem. So i took my old battery out of the phone and when i turned it over i noticed a dent and a crease running down one side of it (probably the culprit). I put the new battery in, plugged the phone in and a little while later i got a green light and a 100% battery status! I was worried that there was something actually wrong with the phone but a $50 gamble later and im good to go. Oh i also tried charging the old battery in the charger but it would not finish the charging cycle (wouldnt go green after 3 hrs in it and the battery according to my phone was at 80% when i took it out).
Sent from my SGH-I747M using xda app-developers app

DrJohnnyFever said:
So another morning went by with the same issue and i figured i had to try something else. I went into The Source after work and went ahead and purchased the extra battery kit they sell (comes with the battery and a battery charger/stand) making sure that i could return it if it turned out that it didnt solve my problem. So i took my old battery out of the phone and when i turned it over i noticed a dent and a crease running down one side of it (probably the culprit). I put the new battery in, plugged the phone in and a little while later i got a green light and a 100% battery status! I was worried that there was something actually wrong with the phone but a $50 gamble later and im good to go. Oh i also tried charging the old battery in the charger but it would not finish the charging cycle (wouldnt go green after 3 hrs in it and the battery according to my phone was at 80% when i took it out).
Sent from my SGH-I747M using xda app-developers app
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Yikes! Lucky you noticed this before it turned into a big problem. With visible physical damage to that extent i would say the chances of that battery causing some serious damage is high, especially if it had went unnoticed and was used for extended periods of time. I would contact Samsung as they should replace the battery under warranty if the battery was in that condition coming out of the box.

See thats the thing. I bought the phone used and the issue was there since day one of owning it. Since these phones havent been out for a year yet, there should still be some kind of warranty on it and i guess it wouldnt hurt to try contacting samsung about it. Who knows, i could get a spare battery out of the whole thing.
Sent from my SGH-I747M using xda app-developers app

My only problem with that is who knows how it got that way, if it didnt ship from the factory in that condition Samsung shouldn't be held responsible.

True but how in the world could someone do that on purpose? The condition of the phone itself is about a 9/10. Unless they took it out for who knows what reason and dropped it and whatever else. I'll never know. Maybe i will just leave it alone. Everything is back to the way it should be...
Sent from my SGH-I747M using xda app-developers app

How to Reset the Battery

While I was charging my battery I was testing different ROMs and restarting the phone multiple times and I think now it's not working properly because is in 75% it says charing but it has been stuck in 75% for 2 hours, so maybe it's already at 100% but the OS think it's only 75%, is there a way to reset the battery?, thanks

what is the specialist of AT&T towards this device?

not sure if it will help but there is an app called "Battery Calibration" in the play store. Give that a shot and see if that helps

brosenz said:
While I was charging my battery I was testing different ROMs and restarting the phone multiple times and I think now it's not working properly because is in 75% it says charing but it has been stuck in 75% for 2 hours, so maybe it's already at 100% but the OS think it's only 75%, is there a way to reset the battery?, thanks
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Try to wipe batt stats through cwm. Or use a battery calibrator from the play store
Sent from my SAMSUNG-SGH-I317 using xda premium

not sure if it is the same thing on the gn2, but this same problem would happen to me when I had my old moto atrix.
How i fixed it was to do the following all while the phone is plugged into the wall:
- shutdown the phone
- with the phone off, plug the phone into the charger and let the battery icon appear on the screen indicating that the phone is charging
- once you believe the phone is full (a few hours on the charger), remove the battery (while it is still plugged in)
- Then a battery with a question mark would appear since there is no battery
- leave the battery out for 5 - 10 seconds, then place back into the phone (still plugged into the wall)
- let the phone charge for another 5 or so minutes
- Turn the phone on
This would always reset how Android would report the battery percentage, and it would always revert back to 100% once I turned the phone back on.
Like I said, I haven't had this problem on my gn2 yet, so i haven't tried it myself. Good luck.