iPhone 5 dying at 30% battery, but battery ok

Discussion in 'iPhone' started by sinar, Apr 1, 2015.

  1. sinar macrumors regular

    Oct 11, 2007

    I was wondering if anyone had encountered a similar problem.

    I have an iPhone 5, about a year ago i had a problem with it shutting down even though there seemed to be a lot of battery life left (30-40%). I took it to the Apple store and they diagnosed a faulty battery and then replaced it the battery.

    Now, a year later, i find i have a similar problem, it's only happening intermittently, sometimes the phone will shut down, even though its reading 20-30% battery left.

    Today, i took it to an Apple store to have the battery replaced, but they tested it and said there was nothing wrong with battery so there was no point in replacing it, they said the phone was defective and i needed to buy a replacement.

    Other than this problem the phone is working fine so i declined a replacement as i can't afford the £200 replacement cost at the moment, and i will continue to carry around a small USB battery pack for when it dies on me when i'm out and about, I'm hoping to continue using it until the next iPhone is released.

    The Genius did not tell me what was actually wrong with the phone, and i'm curious as to what the problem might be, if anyone has any insight i'd be very interested to hear it

  2. gardiboy macrumors 6502a

    Sep 30, 2011
    Consider thinking if this was due to a software/OS issue?

    - Backup your existing phone first.
    - Do a full restore (whipe out) WITHOUT restoring from any backup.
    - Reinstall those important apps and monitor from there.

    Yes, and make sure you are on iOS 8.2.
  3. sinar thread starter macrumors regular

    Oct 11, 2007
    Thanks, i am on 8.2, i will try doing a full restore as you suggest, personally my first thought was when he said the battery was ok was a software issue, but he was adamant there was something wrong with the phone, but I don't know how he deduced that, I thought that if a hardware fault had come up in the test he would be able to say what the issue might be, and he would not tell me what he thought was wrong with it
  4. MarcoCapa macrumors regular

    Jun 16, 2013
    Do a full restare... My 4s some years ago did that... Full restore and everything goes fine.... If you reinstall like a new device you have the opportunity to check the app that you use: not a fantastic task, but useful to gain free space
  5. jtaylor673 macrumors newbie

    Mar 19, 2013
    Jacksonville FL
    same problem

    I have the same problem. The tech at Apple told me it was an issue with the power supply. (where the charger cord plugs in)

    I also notice that when the phone is charging I can't always swipe to unlock the screen. When I unplug, I can swipe just fine.

    Anyway, what I found helps is it to run the phone until it dies.
    Then plug in until it reboots.
    Then unplug until it dies. (watch viedo)
    repeat several times.
    finally recharge to 100%.
    This seems to help get the phone to die at a percentage less than thirty.
    At least for a while.

  6. Skylitfly macrumors 6502a

    May 3, 2014
    Well, I've had this problem with every iPhone I've owned so far... sort of.

    Often when I'm outside during winter and I have to use it for a bit longer than just standard 30 seconds it may shut down even if I have 20-30% battery left. I've always assumed that this is due to cold weather at winter because I'm able to boot it once I get inside and have same amount of battery left as when it shut down.

    This problem never occurs when it's warmer outside.
  7. sinar thread starter macrumors regular

    Oct 11, 2007
    Thanks for the replies, I've done a full restore and set it up as a new iPhone, i'm going to keep it to the default apps for a while and see how it goes.
  8. Ultra AleM macrumors 6502a

    Ultra AleM

    Jun 22, 2012
    Could you post a screenshot of your usage? Thanks a lot
  9. TheLondonFella Suspended


    Oct 6, 2014
    I had the same issue with my 4S.

    Had a battery replacement (official, done in an Apple Store) but the problem persisted.

    The phone was just bad.

    Had many, many problems with the 4S & after speaking with customer relations they agreed to upgrade it to a 5 (the 4S was bought SIM free - no contract or anything).

    Sometimes you have to push, but if you use the right attitude Apple is great for seeing you right ...


    Don't drive yourself mad over this.

    Something is fundamentally wrong with your phone.

    Speak with customer relations ...
  10. sinar thread starter macrumors regular

    Oct 11, 2007
    Just thought i'd update this thread, since wiping the phone and setting it up as a new device, i have no problems with the battery, it's running down to zero percent and has not shut of before reaching it, i'm going to start adding additional apps to see if the problem reoccurs, thanks for all the advice.

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