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Nexus 7 dying at 25% battery

Without fail my Nexus 7 seems to die around 25% battery. Strangely, this only happened after I unlocked/rooted it, but now it happens every time. I even charged to full, used CWM to wipe battery stats and let it run down from there, still no dice.
Safe to say I should get a replacement?

No? I'd be surprised if I'm the only one having this problem... Seems like the Nexus 7's hardware issues are pretty widespread.

I must admit, when it died, I dont know what % the battery was at.

omnikai said:
No? I'd be surprised if I'm the only one having this problem... Seems like the Nexus 7's hardware issues are pretty widespread.
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Since youve rooted it, your warranty may be void, assuming that it wont be have you tried a custom rom? as daft as it sounds i had this issue on my old HTC desire, but a custom rom did fix this.
I havent had any issues at all with my nexus 7, my nexus was down to 8% last night when i plugged it in to charge before bed.
Aslo i wouldnt assume there are "wide spread" issues with the nexus7, for every device ever made there are always numerous threads about faults and the odd pixel being missing, people like to come onto the internet to broadcast there views when they feel they have been slighted or wronged in someway, if there was any "widespread issues with the nexus" (such as apples antenagate issue with the iphone 4) then it would be everywhere over ever tech blog.

Jjust reflash a different Rom
》》》Samsung Galaxy S3《《《

Been down as low as 2% before relenting and letting the poor thing power up. Rooted and on jr5.

Thanks for the feedback all, perhaps I'll try un-rooting it while at 100% battery and see if it fully discharges. Perhaps it's just sensitive about the battery capacity when it changes ROMs/Bootloader status.

My Nexus 7 is doing the same thing at 20%. What happened to yours?

Have you tried a factory reset? That's fixed similar problems on other devices.

Factory reset yes, but not at 100% charge.

Mine dies at/or around 30% - I'm stock+not rooted.

Factory reset it. It doesn't matter what the charge percentage is. I did it to mine and it's working fine

clear your batter stats in CWM, full charge, full discharge, full charge

davidcampbell said:
clear your batter stats in CWM, full charge, full discharge, full charge
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I tried this and it didn't work for me. The only thing that did was a factory reset by flashing the stock image through the root manager tool.

A user named NeoMagus has received two units with this issue, but I haven't seen many people mention it otherwise.
http://forum.xda-developers.com/showthread.php?p=30787728#post30787728
I'm new to tablets but I returned a Fire with the same problem. I assume it's a freak battery thing and not something innate to this device.

Yup my first C6 and last C7 also had this problem. Charged/Decharged fine for about a week, then just started turning off at about 19-20%. The screen would also display in very small text "show low low battery logo". Re-flashing stock, wiping, calibrating by deleting batterystats.bin, nothing helped, always died at 20%. Just ended up exchanging both so don't know what to tell you guys, everyone else seems to be fine so my only conclusion is bunk battery

omnikai said:
Without fail my Nexus 7 seems to die around 25% battery. Strangely, this only happened after I unlocked/rooted it, but now it happens every time. I even charged to full, used CWM to wipe battery stats and let it run down from there, still no dice.
Safe to say I should get a replacement?
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Click to collapse
Flash back stock ROM, lock boot loader and see if it fix. At this point, you got back your warranty and can ask for replacement
Sent from my Nexus 7 using Tapatalk 2

I have the same issue on mine, which is stock/unrooted. I just did a factory reset and it's been okay so far, but it's a little early to tell if it really worked.
**UPDATE** - Doing a factory reset did not fix the issue. It died again after some more use. I'm going to return it to Google.
**UPDATE 2** - After connecting the device to the charger and powering it on again it reported 0% battery. I charged it back up to 100% and I've currently run it back down to 7%. I'm not sure how or why it's working now, but it does seem to be a problem with the software misreporting the remaining battery life.

Mine shut down at 9% last night. Not that bad but not ideal I think it should go to 2-4% or 'go down with the ship' at 0% like my phone does.
Oh well I'm going to get a replacement after my next trip due to audio and touchscreen issues, I've been putting it off in hopes that they iron it out but I can't wait much longer a dead left headphone and random zooming when I scroll is a drag.

Same here ,last week my N7 died at 15% battery
but now at 20% ..
no Low battery Logo show
Should i do Factory Reset ???

Battery has a lot of issues

Hey guys,
I am having a few bugs with the battery indicator on my Tegra Note 7. It is always freezing up at random percentages and does not give an accurate reading. For example it thinks it is at 81% right now, and if I were to reboot it it will only actually be at like, 40%. I was just wondering is this a bug with only my device? Or are other people experiencing the same thing? I'm at thempst recent OTA, but its something I've been experiencing since I first opened it.
Also, like many others have noted, when I updated to Android 4.4.2, the battery seems to drain A LOT faster. Like, its down 10 percent in 30 minutes on balanced battery. These bugs kind of make me want to refund it and buy an nexus 7 instead. I've only had the thing for about 3 days.

Quick update, I'm just about to do a battery calibration to see if this fixes the wrong reading issue. If not it may be a hardware defect.

JakeTheOneDude said:
Quick update, I'm just about to do a battery calibration to see if this fixes the wrong reading issue. If not it may be a hardware defect.
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That's weird, because ever since the latest OTA, my battery life has been stellar! Sitting in standby, it'll go literally a week without a charge, and during use it seems quite reasonable. I wonder if it's because I did a full factory reset after the update... I've had mine since launch, and after so many updates I figured it might be a good idea to do a full reset, and it cleared up a lot of my issues.

rchrdcrg said:
That's weird, because ever since the latest OTA, my battery life has been stellar! Sitting in standby, it'll go literally a week without a charge, and during use it seems quite reasonable. I wonder if it's because I did a full factory reset after the update... I've had mine since launch, and after so many updates I figured it might be a good idea to do a full reset, and it cleared up a lot of my issues.
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That may be a good idea. The reading issue is something that has been going on since the first day I got it. I had to walk to the library to set it up with all my games and such, and the whole time (about two hours) I was there I thought I had a charge 57%. I went home and rebooted to realize the battery was actually only at 8%! Since the calibration, I haven't seen the issue as of yet, and the battery seems to be working a lot better. I may try a factory reset however because I am having a few unrelated touch screen issues and stylus issues.

[Q] Nexus 4 sudden signal loss, battery drain and shutdown!

Hi all,
First post so go easy :angel:
I've had my N4 for about 18 months. Ever since 4.4.3 (now on 4.4.4 and nothings changed) I think I have been having some probelms.....I also dropped my phone around the time of the update so can't rule out a hardware problem, anyway....
On full charge the phone is, after a random amount of use perhaps around half battery, it drops signal completely....then it start goiing crazy, opening apps clicking on things (sometimes locks up) then shuts it's self off.
Once I turn it back on it says the battery is almost out.....even though before the crash it was at 50%???? (Please see imnage below for "cliff edge" on battery screen shot!)
I have tried safe mode, I have done a factory reset and removed all and any apps except facebook. Other symptoms include forgeting wifi and other account logins!
Also worth noteing I dropped it and smashed the screen, I then had it repaired and voided the warrenty (?) because I needed it same day for work.....dont know if thats connected was working fine for a while after this happened.
I have seen various posts of this forum and other about this kind of thing but no exact answers.....any help would be great 7 months until free new phone
Sudden drop is extreme right....

Re flash factory images for a full wipe, if it doesn't work after that then its probably hardware (sadly), maybe you could get a moto g? I've heard there really good and cheap.
Sent from my Nexus 4 using XDA Free mobile app

Sounds like something went wrong during the repair or drop and that this is a hardware issue. As suggested, try flashing full stock, but I am pretty sure this is a hardware problem, unfortunately.
Sent from my Nexus 4 using XDA Free mobile app

Thanks guys .....Ive been doing as much reading as pos.
Some people are saying reather than the drop its maybe just a failed battery? thoughts?

It could definitely be a possibility. If you are up to it, you could purchase a new battery and try to replace it, there is just the risk of damaging something further.
Sent from my Nexus 4 using XDA Free mobile app

Same things happen to me. I thouhgt the battery is comming to end and orderd new one but I have read that people have some similar problems after updating from 4.4.2
On nexus 5 people also have problem with to fast battery drain. I have similar problems. I lose network, afterwards battery drop from 20-40% -> 0%
Sent from mobile

Just happened again...
http://img842.imageshack.us/img842/4405/tlam4.jpg
Sent from mobile

Not that I'm any expert but I think that your battery might be damaged

I have ordered new one. I shall see.
Sent from mobile

Please do update on how you get on Rajnus.
Nice to know Im not alone anyway :good:

ArcNexus said:
Please do update on how you get on Rajnus.
Nice to know Im not alone anyway :good:
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Ofcourse...
Sent from mobile

Same thing is happening to my wifes NEXUS 4. Hers is a little over a year old now. It was dropped and I replaced the screen a few months ago, but ever since the new updates, her phone has been going CRAZY!
The phone randomly loses signal, battery drains quickly and apps open close (ghost touches) and then it shuts down.
I've cleared the cache, reset to factory defaults and even run in safe mode and nothing. The phone is useless now, she maybe gets 2 hours of normal use out of it before it goes completely nuts again.

One of us should roll back to 4.2.2. and report the result

Rajnus said:
One of us should roll back to 4.2.2. and report the result
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Facing similar issues. Have posted it here. http://forum.xda-developers.com/nexus-4/help/fast-battery-discharge-t2799931/post53790262?nocache=1
Any solutions?

I am waiting for a new battery. Try rollback to 4.2.2.

ITs same on my phone after an 4.4.3 update teh N4 gone rogue before the update it was working just fine I just did factory reset got back to 4.2.1 android and its doing the same

Just to keep you up to speed...I suspect it may be the battery....or perhaps power management issue/conflict??
Trick is if I keep my battery charge above 60-65% it's fine......get below that and the trouble start.....weird. hvaing said that seems to drain faster than normal also. My hope are pinned on battery solution once Rajnus trys it.
Although not looking foward to taking phone apart to replace it

Today after the first symptom I rebooted phone and after reboot my battery was at 14%. It looks like to me that we have constant drain but system some how is not registering it properly. I will restart after every 10%
Edit: 85% ->reboot -> 57%
Sent from mobile

I'm glad to see I'm not the only one suffering from this issues as well. I replaced my screen and digitizer about 3 months ago and never had issues. Last week I updated from 4.4.2 to 4.4.3 (and 4.4.4 shortly after) and started having the same issues where there would be ghost touches on the screen once I got to around 70% battery, loss of radio/signal, and when I would restart the phone, I would lose majority of the battery charge. I tried flashing stock back on the phone and the problem still is present.

slbp180 said:
I'm glad to see I'm not the only one suffering from this issues as well. I replaced my screen and digitizer about 3 months ago and never had issues. Last week I updated from 4.4.2 to 4.4.3 (and 4.4.4 shortly after) and started having the same issues where there would be ghost touches on the screen once I got to around 70% battery, loss of radio/signal, and when I would restart the phone, I would lose majority of the battery charge. I tried flashing stock back on the phone and the problem still is present.
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Just to repeat that is exactly what is happening to me word for word.

anybody get the latest update G935VVRS4BQC9

Let me know your thoughts

Unremarkable, nothing but security update AFAIK.
Sent from my SM-G935V using Tapatalk

I didn't have optimizing apps like normal and the update was much faster, but than again that might have happened since we got Nougat and I didn't notice it in the last two updates.
Otherwise its typical security update.

Actually after I did the update, now every time my phone rings Spotify starts and I cannot figure out how to stop that from happening. Extremely annoying

mmw68666 said:
Let me know your thoughts
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S7 edge here. Got it last night, no issues so far. Wondering if anyone can report on root status?
EDIT: Actually working fine with no issues after several weeks.

Patch installed. No issues.

Smabbage said:
Patch installed. No issues.
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I had two bugs that it actually fixed:
When I was connected to AC power, and on bluetooth, and would hit the dialer app it would restart the System UI and display an error stating that the system integrity couldn't be verified and suggesting to recover the phone using the Verizon **** tools.
When you set a reminder and turn the screen off before the "Reminder saved" verbiage was stated then the phone will go ahead and say that EVERY time you unlock the phone.

It has caused noticeably higher battery drain on my S7E during the day. I left it fully charged and unplugged over night after the update, and it only lost 2%, so Doze is working in that case. But when carrying it around, it drains faster than I've ever seen it drain by quite a lot. I'm assuming it's a rouge app that has some issue with the update. MyRadar may be the culprit according the battery monitor, as it often was on my Nexus 6P.
I've cleared both cache's several times and done several reboots to no effect.

I was right, it was MyRadar. I tried to optimize it, but it did not help. I finally uninstalled it and my battery life is at least as good as ever, and it's always been outstanding on this phone.
As a very outdoor oriented person, so I love the MyRadar app. But it's been a glitchy app for me for far too long. I'm using Radar Express now instead, and it is not impacting my battery drain so far.

Dreaded Battery Issue

So, my phone the past couple months has started turning off at 25 percent battery life left. Battery is also draining faster than normal. Reading up this is a major issue on a lot of 6ps. Some say replacing the battery fixed it, some say it didn't. Some say that calibrating the battery fixes it, same say it doesnt. Some say that factory reset fixes it, some says it doesnt. I have also tried all of these with no luckI have a replacement phone coming from Google but some say the replacement has the same issue. Some are saying it is not a software issue, some are saying it is.
.Is there anything else I can try?

techbeck said:
So, my phone the past couple months has started turning off at 25 percent battery life left. Battery is also draining faster than normal. Reading up this is a major issue on a lot of 6ps. Some say replacing the battery fixed it, some say it didn't. Some say that calibrating the battery fixes it, same say it doesnt. Some say that factory reset fixes it, some says it doesnt. I have also tried all of these with no luckI have a replacement phone coming from Google but some say the replacement has the same issue. Some are saying it is not a software issue, some are saying it is.
.Is there anything else I can try?
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Try flashing a custom rom&kernel, I doubt it will totally fix it, but it might at least help.

I got a replacement on order. I did a factory reset/complete wipe yesterday and so far, appears to be much better. Phone is snappier and things like Smart Lock popped up when it didnt before. Also, my alarm I used to only have to press the onscreen icon to silence it, not I have to slide to silence. So things are a little different (same OS version) so I am curious if things were just screwed up. I have not done a complete wipe since I got my phone about 2yrs ago. Time will tell tho and I have not run down my phone below 25 yet to see if that is still happening. But like I said, I got a replacement coming.

It's the battery. You need to replace it. Not a pleasant or easy thing to do with the way the Nexus 6P is constructed, but not impossible either. Do it, and it will work like the day it rolled off the Chinese factory floor.

rajendra82 said:
It's the battery. You need to replace it. Not a pleasant or easy thing to do with the way the Nexus 6P is constructed, but not impossible either. Do it, and it will work like the day it rolled off the Chinese factory floor.
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Google replaced it out of warranty so I went that route. I saw vids about changing the battery, but this worked better. And the new phone addressed my issue.