Battery voltage level issue - Samsung Galaxy Nexus

So my phone was at ~50% battery today when I did a reboot in AOKP M3. For whatever reason, it shut down, but didn't restart and the power button didn't turn the device on either. Easy enough solution, I just did a quick battery pull and restarted my GNexus. Now it's reading 100% charged at 3820mV when that should be at ~4200mV. Anyone know how to fix this? Plugging it in says it's charged. I know deleting the batterystats file won't actually do anything either. Should I just drain it and then charge it back up?

Ya, in this case I would delete the stats file anyway and run a benchmark in a loop until the GN switches itself off. Then recharge to 100% and do not interrupt the charging process. Guess there is not much else you can do to "recalibrate" the meter.

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[Q] Phone won't turn on

I was using my phone as a wifi router for a long period of time, for about an hour, while it was on external power. The phone reset itself a few times and then turned off. Now if I press the power button it begins to power on but turns off after a few seconds. Any suggestions on how to fix it? I'm not sure if it matters, but I have an energy rom installed.
Thanks
Try this
remove / reinstall the battery?
my friends did the same thing more or less and that fixed his
he said it reset the battery image??
I tried removing the battery and putting it back in, but no luck. I also let the phone sit with the battery removed for an hour but that didn't work either. Any other suggestions?
Thanks
avacedani said:
I tried removing the battery and putting it back in, but no luck. I also let the phone sit with the battery removed for an hour but that didn't work either. Any other suggestions?
Thanks
Click to expand...
Click to collapse
Does the phone charge? Maybe the battery got depleted. Try charging overnight. If that doesn't work, replace the battery.
The phone does charge. I'll try charging overnight tonight, hopefully that works.

[Q] Stopped charging: Unusual

Apologies for another not charging thread, i have tried searching for a similar issue but no luck.
I put my DHD to charge as usual last night at around 40%, the charge LED lit up and the battery icon was showing that i am charging.
When i woke this morning, the charge LED and battery icon were still showing that i should be charging yet the phone now only has 33% battery, so clearly hadnt charged. I checked current widget and when the LED and icon show charging i only seem to be getting anywhere between a reading of 40mA and 270mA. With an occasional 300-400mA reading.
I seem to be able to intermittently get the phone to charge and the batt icon to rise by a percent or two but then it seems to stop again. As i am in work at the moment i am having to charge via USB from my PC. Therefore i am currently unable to try another micro USB charger and see if it is indeed the charger or the phone.
Has anyone else had a similar issue, says it charging but it not??
Or anyone have any ideas of a solution??
If it matters i am currently using LeeDrOiD HD V3.3.1 GB. Id rather not have to return it to HTC as i am unsure of how to return the phone to default easily so it could be repaired on warranty.
Thanks in advance,
James
Firstly, download CurrentWidget, set refresh to 15 seconds, and make sure you set it to display battery voltage. If it is showing around 4200mV, it is charged, and you have a problem with the battery gauge.
To double check, turn off your phone, and see if the light goes green at 100%.
Boot back up, just to see if a reset fixes it.
If not, reboot into recovery, and wipe battery stats (or do it properly, turn off, wait until light is green, wait another hour, then boot into recovery and wipe battery stats).
Turn back on, and see if the problem is sorted.
Sent from my Desire HD using Tapatalk

My G2 will shut itself off - any suggestions?

I'm looking for any ideas for the problem I'm having on my G2. I'm afraid it's a hardware problem and not much I can do about it.
I started having problems after upgrading from CM 7.1 to 7.2, but I don't think it was related to the upgrade. I started having battery draining problems, the phone took forever to get fully charged, and car mode would automatically start sometimes when plugging up or unplugging the charger. I cleaned the usb port with alcohol (with battery removed), let dry, and restarted. Now I don't have the car mode problem and the battery problem is somewhat better.
My problem now is that the phone will just die when I'm using it. Usually when I'm using the browser. I'll be scrolling on a page and the phone will just turn itself off. Like the battery died. I can turn the phone back on and it will start up, get all the way started back up, but while it is still loading the home screen widgets, it will go off again. I can repeat this several times. The only way to recover is to plug in the charger. I don't have to hit the power button again, just plugging in the charger will start up recovery mode automatically, I'll choose reboot and the phone will start normally then and stay on.
The phone never dies when I'm not using it. I'll carry it all day, making phone calls on and off, and it'll stay on with no problem. Mostly, I only have the problem when using the browser. Also had the problem while using my newsreader. Once during playing a game. But if I start up browsing the internet, it doesn't take long before it will turn itself off. A matter of a couple of minutes. I don't have the problem with reading emails with K9. Don't have a problem in downloading from the internet such as podcasts. Don't have a problem in sending text messages. Don't recall it shutting down while using the Facebook app. After putting up with this for a week, some troubleshooting and observations.
I never have this problem if the charger is plugged in. Only when it is running fully from the battery.
I've tried swapping to a different battery.
Turned down the overclocking with no difference.
I've changed to other recoveries, CM 7.2, CM 7.1, a CM 7.1 that I was running in May. No difference.
I've swapped memory cards.
I've reset battery stats.
No difference if running on wifi or just data.
Clearing caches made no difference.
So, I start thinking it must be a hardware problem, but then why does it only crop up when internet browsing. Must be power related since plugging in the charger makes it go away, but why does it not have a problem with using the phone in other ways?
Any suggestions on what I could try?
You could try to see if there is too much voltage drop when you start something power-hungry. Use a battery voltage logger and post the results. Start logging, let the phoneidle for a minute and then start browsing. Even if the phone shut off, the log should still be there after rebooting.
Thanks for the idea. I can't locate a logger that looks like it would work. It would have to capture a quick drop in voltage that is momentary. This problem happens even on a full battery and when the phone come back on (either momentarily or after a recovery reboot) the battery level is unchanged.
You might try as well an other way: first idle, then gradually step up to a more power hungry app to see when the problem actually happens. I have no other ideas...
Make sure that you dont have any contact with the battery and the door.
Normally batteries are covered with an aluminum wrap, and can cause short-cuts with the phone itself.
I searched it for a while with the galilio batteries.
You can try to put some saranhwrap around the battery.
I have the same problem with two different batteries. But I'm ready to try that too.
Battery graph
So here's a graph of my battery status. Long time to charge to 100%. Discharges pretty rapidly. Each downturn ends in the phone turning itself off. Notice that at 7:30 today, it turned itself off, I did a recovery reboot, then noticed it wasn't charging very well (green line turns to blue but doesn't increase), then I did a manual reboot and when the phone restarted, it showed the battery was at 100% charge (from about 60% before the reboot).
What do you think - hardware or software?
oVeRdOsE. said:
Make sure that you dont have any contact with the battery and the door.
Normally batteries are covered with an aluminum wrap, and can cause short-cuts with the phone itself.
I searched it for a while with the galilio batteries.
You can try to put some saranhwrap around the battery.
Click to expand...
Click to collapse
Well, I just took the cover off for awhile and tried it. Played crosswords (Shortz) for awhile with no problems. Started my newsreader (Newsrob) and it shut itself off in about 15 seconds. So, no short to the battery cover.
Same thing is happening to me. I use poweramp or the browser and the G2 just shuts off. Then I restart it and it tells me that the battery is low. Once I shut it down and reboot in recovery and wipe the battery cache it's back to it's normal battery level. I disabled data and set my phone for 2G networks only and it didn't shut off after. I'm assuming this is a wireless issue? I'm running mimicry 1.3.0 on my G2.
Had the same problem. Swapped out batteries and problem gone.
Sent from my HTC Vision using xda app-developers app
Did you swap the battery and immediately have no further problems? I tried swapping my battery already and still have the same problem.

Battery problems help...

I have ViperX 2.7.0 rom with the stock kernal.
I fully charged, then fully discharged, then fully charged again! I then re-set battery stats anyways.
I took it off charge this morning, was draining a little fast. Was around 85%, I turned it on then off. and bam within like 10 seconds it's down to 40%...
And it's still draining.
Thoughts?
check your battery stats, is there a precipitant drop suddenly?
try disable mobile data and wifi and see if that changes anything.
crislevin said:
check your battery stats, is there a precipitant drop suddenly?
try disable mobile data and wifi and see if that changes anything.
Click to expand...
Click to collapse
In my battery stats.
It powers off, then the gap is blank... THen it starts again halfway down the graph.
okay, That is a precipitate drop.
I am not an expert on this, but before the expert jumping in. I would suggest some experiments
1. if your battery is not empty, use power control widget to turn off mobile data and wifi, let it sit for a hr or two and see if battery drains, and how much. If there is little battery drain, then the background app and data transfer may be the problem for your bad battery drain.
2. charge it to 100%, when it reaches 100%, turn it off and charge for another 15 minutes, turn it on and use it, see if another precipitate drop occur, and if yes, see if they occur at roughly same battery level. I would think if it occurs every time, it may be a hardware problem.
crislevin said:
okay, That is a precipitate drop.
I am not an expert on this, but before the expert jumping in. I would suggest some experiments
1. if your battery is not empty, use power control widget to turn off mobile data and wifi, let it sit for a hr or two and see if battery drains, and how much. If there is little battery drain, then the background app and data transfer may be the problem for your bad battery drain.
2. charge it to 100%, when it reaches 100%, turn it off and charge for another 15 minutes, turn it on and use it, see if another precipitate drop occur, and if yes, see if they occur at roughly same battery level. I would think if it occurs every time, it may be a hardware problem.
Click to expand...
Click to collapse
Thanks for the reply.
I don't have bad drain before this drop.
It's on charge now (from the drop) Going to leave it and see what happens.
install watchdog https://play.google.com/store/apps/...GwsMSwxLDEsImNvbS56b211dC53YXRjaGRvZ2xpdGUiXQ.. to monitor the culprit.
also did you install any new app/game lately, that may be causing problem... i had a similar issue and then i uninstalled the app and all was good...

[Q] Unexpected shutdown when battery is low

Recently my N7(2013) will shut itself down when the battery is low (about 10%) without any warnings, not even the "Shutting Down" dialog that it should show whenever it shuts downs (except for the usual low batt warning when it reaches 15%). After the shutdown, I cant even turn it back on not even the screen, nor the low batt (waiting for charger) screen is showing up until I plug it into a power source the it will show the charging screen and then I can turn it on again.
Its been a few times now, not sure its a hardware or software problem though. It shouldnt shut down when it still has 10% in it right?
Attached is the screenshot of the Battery Usage that shows the battery level shots down to 0% immediately from 10%.
Nexus 7 2013, Stock, Not Rooted
Are you using a battery monitoring program (battery doctor, better battery stats, etc)? If so, look in their settings, to see if they are set to shut down @ 10%...
BSnapp said:
Are you using a battery monitoring program (battery doctor, better battery stats, etc)? If so, look in their settings, to see if they are set to shut down @ 10%...
Click to expand...
Click to collapse
Nah I don't trust these apps so I don't use them. Moreover I'm did not root it so even if I use them they shouldnt have the permission to shut it down
Simple fix
It is an issue I have suffered with a couple of times and it appears we are not alone. It seems that the battery calibration is out of whack. When you charge your nexus up does it stay at 100% for quite a while? I
tried factory data resets amongst other things and nothing worked. I stumbled across a thread with a really simple fix. Turn your tablet off for 2 hours. Then turn it on again. Mine miraculously lost 26% of battery in that time (from 100% where it had been for 8 hours down to 74%). Then it started to use the battery at a normal rate. Working fine now.

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