iPhone 5 shutting down with 10% left?

Discussion in 'iPhone' started by lthompson, Sep 18, 2013.

  1. macrumors member

    Jul 13, 2011
    Every since I installed IOS7 Beta my phone has shut down with around 3-4% battery left. This morning I was viewing a video on instagram with 10% left and it shut down. Anyone else have this happen?
  2. macrumors 601


    Jul 14, 2010
    Phila, PA
    It's possible the phone actually had 3-4 left and it's showing a different percentage on the phone.
  3. macrumors Nehalem


    Feb 19, 2005
    Which beta version are you talking about? There were technically 6 releases of iOS 7 while in beta before it hit GM (though one was a security fix).

    That said, are you on the last beta before GM? If so, like rockyroad said, it could be that you had less power than you thought. Are you using the phone when it happens? I've noticed when I get the 10% warning while playing music, texting, talking on the phone, or browsing the web that 10% goes by in a flash.
    This is on a 4S though running the last beta before GM.
  4. macrumors 6502

    May 3, 2011
    Yes I've noticed this three time since I installed the GM
  5. TSX
    macrumors 68030


    Oct 1, 2008
  6. macrumors 65816

    Jul 16, 2010
    i had it shut down once at 30%. tried turning it on- said i needed to charge, cantt turn on.
    plugged it into mobile charger, immediatly went on and showed 26% battery remaining.
  7. macrumors 68000

    MuGeN PoWeR

    Jun 29, 2011
    I am also facing this problem and i am currently on beta 6. Will be updating to ios 7 today then see the situation.
  8. macrumors 6502a


    Jun 15, 2010
    Edinburgh, Scotland
    I have had this happen on iOS 6 couple of times lately. I assumed it was because the display indication of 10% was wrong or couldn't be updated due to lack of battery power!
  9. thread starter macrumors member

    Jul 13, 2011
  10. macrumors 6502a


    Aug 13, 2010
    My iPhone 4 would normally shutdown at 3% always.. lately I noticed it shutting down at 10%. I am running iOS6.
  11. macrumors 68040


    May 31, 2007
    Florida, USA
    The phone will automatically shut down when a certain minimum voltage threshold is reached. This is to protect the battery from damage.

    When the battery is almost dead, a greater load (like watching a video) will result in lower terminal voltage than a smaller load (like listening to music with the screen off). This makes it more likely that the low cutoff will be hit when your percentage meter still reads a higher number.

    Older batteries with more wear on them exacerbate this behavior. The battery meter circuit and code will try to learn the characteristics of the battery, but if they are changing too quickly (battery is going bad) you may get odd behavior like shutting down at higher percentages.

    If this keeps up and the phone is under warranty, take it in.
  12. macrumors 6502

    Feb 27, 2011
    good info, zorinlynx.

    My 4S would do this at around 20% sometimes (OS6)... yeah, always seemed to do it when trying to view a vid or similar... Once it died, I'd let it sit for a minute or two, and then turn it back on, and it would be fine.

    I did get a replacement a week or so ago (for that and another screen issue), and so far no issues with the new phone.
  13. thread starter macrumors member

    Jul 13, 2011
    Before IOS7 Beta in order to get my phone to run completely down I would put on watchespn when the battery got down to 2 to 3% and it would run at least another 15 minutes before shutting down.
  14. macrumors member

    Jun 1, 2011
    Had this problem on iOS 6 a week ago, went into Apple and they replaced my iP5.
  15. macrumors 68040


    May 31, 2007
    Florida, USA
    Yup, that's high battery resistance, and a flaw. Glad you got it replaced. :)
  16. macrumors 6502a


    Dec 23, 2012
    Recalibrate your battery, if it doesn't help go to the apple store, a friend of mine was having the same issue and they changed the battery for him :)
  17. macrumors 68000


    Jul 7, 2007
    The hood
    If he's using it until it shuts off, that is exactly what he's doing.

    OP, I got the same problem as well... Expect 7.0.1 to fix it.
  18. macrumors newbie

    Jun 11, 2012
    wow, a lot of people are really beating their batteries up
  19. macrumors G3


    Jun 11, 2008
    Los Angeles, CA
    try a restore to the public release version of the software. clean install, no backups. try it for a couple of days. if it keeps acting up, make an appointment and take it in.
  20. macrumors Nehalem


    Apr 16, 2008
    At the iPhone hacks section.
    My i5 did the same last night and it shut down at 12%.
    I'm still on 6.1 so I don't think its an ios 7 only thing.

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