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  1. Thread Author  Thread Author    #1  

    Default Nexus 7 battery dead, strange charging behaviour

    Had my Nexus7 for a month now, I think they are great.

    Battery life seems ok so far.

    I normally let the battery run right down before re-charging it.

    Recently the battery life warning has popped up at varying intervals from 14% right down to 5% before switching itself off, now it shows once at 14% then dies.

    When I plug it in to charge, it waits a minute, switches itself on for 30 seconds, then flashes up "auto shut-down" message again and dies.

    The screen says its charging when it switches itself on for those 30 seconds but it repeats this several times.

    Some times the screen shows strange static and lines upon shut-down, not the normal display and the speaker gives out static also.

    Anyone else had a similar problem or know what's wrong with mine?
  2. #2  
    xyzlene's Avatar

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    Default Re: Nexus 7 battery dead, strange charging behaviour

    Are you currently tunning 4.2.1??? I did a total wipe, and my battery life is horrid. Lots of folks over at xda are mentioning all sorts of different battery problems and other bugs with 4.2.1

    My battery life has decreased by 40%.... There is definitely a problem. Your best bet is to do a factory reset / wipe cache, and go back to 4.1.2----- it is a very stable build in my opinion.

    Or just sweat it out and wait for the next ota... Battery is driving me nuts as well, but I do not have the time too completely rebuild my system..


    Best of luck
  3. #3  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Quote Originally Posted by Neil Phillips View Post
    Had my Nexus7 for a month now, I think they are great.

    Battery life seems ok so far.

    I normally let the battery run right down before re-charging it.

    Recently the battery life warning has popped up at varying intervals from 14% right down to 5% before switching itself off, now it shows once at 14% then dies.

    When I plug it in to charge, it waits a minute, switches itself on for 30 seconds, then flashes up "auto shut-down" message again and dies.

    The screen says its charging when it switches itself on for those 30 seconds but it repeats this several times.

    Some times the screen shows strange static and lines upon shut-down, not the normal display and the speaker gives out static also.

    Anyone else had a similar problem or know what's wrong with mine?
    My most logical explanation would be to completely drain the battery, then charge it completely. Proceed at your own risk; I have no source information.

    Sent from my Nexus 7 using Android Central Forums
  4. Thread Author  Thread Author    #4  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    I'm running 4.2.1 but not sure when that was installed.

    Just installed "auto airplane" app to see if that helps battery life.

    The problem Eduardo is when the tablet DOES drain to zero battery, it starts acting strange when its plugged in to recharge
  5. #5  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Quote Originally Posted by Neil Phillips View Post
    I'm running 4.2.1 but not sure when that was installed.

    Just installed "auto airplane" app to see if that helps battery life.

    The problem Eduardo is when the tablet DOES drain to zero battery, it starts acting strange when its plugged in to recharge
    Oh I thought that re-calibrating the battery would work.

    Sent from my Nexus 7 using Android Central Forums
  6. #6  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    I am experiencing the same issue on my new Nexus 7 brought 5 days ago.
    Is this a hardware or software issue?
  7. #7  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Quote Originally Posted by kfcnhl View Post
    I am experiencing the same issue on my new Nexus 7 brought 5 days ago.
    Is this a hardware or software issue?
    Does anybody know if this is related to the auto reboot issue?
  8. #8  
    jamojamo's Avatar

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    Default Re: Nexus 7 battery dead, strange charging behaviour

    Same problem here, also running 4.2.1



    Sent from my Nexus 7
  9. #9  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    I've noticed it takes a good while (half hour or so) of charging before i can turn the n7 on, without it immediately turning itself back off again. I've never experienced this before on a phone or tablet. I'd think it should charge at a faster rate than it needs to stay switched on. In my opinion, that's all it is. Not a fault exactly but it just needs a bit more power to start from a dead battery and remain on.
  10. #10  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Hello,

    I just encountered this problem as well a few days ago and freaked out. I thought something was faulty with my device I didn't think it could be caused by the latest update (which kind of makes sense)

    I was using the device and battery was at about 24% when it suddenly powered off and refused to switch on, when I plugged it in it kept restarting and powering off repeatedly and I had no means to stop the cycle.
  11. #11  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Quote Originally Posted by Sherin Farid View Post
    Hello,

    I just encountered this problem as well a few days ago and freaked out. I thought something was faulty with my device I didn't think it could be caused by the latest update (which kind of makes sense)

    I was using the device and battery was at about 24% when it suddenly powered off and refused to switch on, when I plugged it in it kept restarting and powering off repeatedly and I had no means to stop the cycle.
    How did you fix this problem, Shirin? My Nexus 7 seems like it's in a neverending cycle of restarting itself. I just want it to stop trying to turn on and continue charging but I'm not sure how I can do that. It will turn on for 10 seconds or so, the notification sound for low battery pops up and then immediately there's a static sort of sound after which the device shuts off and starts the whole process over!
  12. #12  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Somebody else in this forum said that pressing (or holding?) the power and volume down buttons in those ten seconds shows up a menu where you can shut it down for good. Then after a while you should be able to turn it on again
    Thanked by:
    liljew likes this.
  13. #13  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Quote Originally Posted by Faizah Muhammadi View Post
    How did you fix this problem, Shirin? My Nexus 7 seems like it's in a neverending cycle of restarting itself. I just want it to stop trying to turn on and continue charging but I'm not sure how I can do that. It will turn on for 10 seconds or so, the notification sound for low battery pops up and then immediately there's a static sort of sound after which the device shuts off and starts the whole process over!
    I suggest doing what Kimi said. Hold the power and volume buttons it will take you to the Recovery mode of the device.

    I was getting the static sound as well and I tried to stop it from this restart loop, unfortunately by the time I thought of booting it into recovery the battery completely died and it stopped restarting on its own. It took well over 8 hours to recharge back to 100% and now I feel like the battery is depleting much faster than before. I hope Google patches up this problem soon.
    liljew likes this.
  14. #14  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    How did you fix this? When I plug my nexus in to charge it boots up starts up the screen comes up normal for about 5 seconds and then the static and noise come. It charges for a couple of minutes and then starts doing it again.
    Someone help please!!!
  15. #15  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Quote Originally Posted by loftysmyth View Post
    How did you fix this? When I plug my nexus in to charge it boots up starts up the screen comes up normal for about 5 seconds and then the static and noise come. It charges for a couple of minutes and then starts doing it again.
    Someone help please!!!
    Did you read the two posts right above yours?
  16. #16  
    Mike Reys's Avatar

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    Default Re: Nexus 7 battery dead, strange charging behaviour

    Exactly the same behaviour here. Just sent it back. None of the recommended procedure (30 second power, 30 second power + volume up,...) seem to help.
  17. #17  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Hi,

    I also had this problem within the last couple of weeks...it stressed me out so bad...I wanna just throw my Nexus 7 ...out the nearest window....But, what I did was calibrate the battery and downloaded an app from Google play...called battery saver and a battery faster charger....results are so far so good....
    Sherin Farid likes this.
  18. #18  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Try this:

    My Nexus 7 isn't charging properly - Nexus Help

    Seems to have worked for mine.
    Thanked by 2:
    Euan Tan likes this.
  19. #19  

    Default Re: Nexus 7 battery dead, strange charging behaviour

    Quote Originally Posted by boysentot View Post
    Try this:

    My Nexus 7 isn't charging properly - Nexus Help

    Seems to have worked for mine.
    I did exactly what it told me to. Then i waited an hour and turned it back on and my Nexus 7 is back to life...
    back story: I used my nexus 7 till it was around 14% but then it started saying "Reconnect to Charger" and then "Powering off" then the screen just crashes and static noise can be heard. I tried doing a hard reset but I didn't know how so I let it sit there and charge while the static noise was going... after an hour, I rebooted it and it powered on with 30% battery... That was the first time. On the second time, it was 28% and then it said "Reconnect to Charger" and then "Powering off"... So I wasnt worried and tried the same method... letting it charge with the static for an hour...this time It didnt work.... and I did a hard reset... didn't do anything. Went to the welcome screen then said "powering Off" Then i saw this link, powered off and saw the battery charging... Right now it is at 35%, everything resetted, (oh well) but its working fine now. Thanks for the link.

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