Interesting battery behavior

Discussion in 'iPhone Tips, Help and Troubleshooting' started by powers74, May 18, 2015.

  1. powers74 macrumors 68000

    powers74

    Joined:
    Aug 18, 2008
    Location:
    At the bend in the river
    #1
    So I bought a used 64GB (storage is the killer app for me) iPhone 5 off ebay (first mistake?), and everything seemed pretty normal. Then I started noticing something weird about the battery behavior. It seems to charge normally and drain normally, that is until it gets down to 20%. The moment I get the "Low Battery" pop-up I've got 10min max before the phone is dead. Then I noticed another thing. When I plug it in to charge it, and it finally comes back to life (nothing irregular there either), it's back at 20/21% batter life!

    Now one day, I hit the 20% threshold and about 5min into my final stretch I decided to turn off wifi. The phone stayed charged with intermittent use for a few more hours as it normally would.

    Has anyone run into this or a similar issue? Was there a solution? Could it be a cheap Chinese battery? I've replaced the battery in a couple iPhones and never seen this behavior, so I'm a little mystified.
     
  2. eelw macrumors 6502a

    eelw

    Joined:
    Sep 19, 2012
    #2
    Unfortunately widespread issue with many 2+ year old iPhone 5 batteries. Check to see if the serial number applies to the recall on early batch models. But a battery replacement should fix the issue.
     
  3. powers74 thread starter macrumors 68000

    powers74

    Joined:
    Aug 18, 2008
    Location:
    At the bend in the river
    #3
    I do remember hearing about that now that you mention it! Thanks!
     

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