iPhone 3Gs battery dies at 30%

Discussion in 'Jailbreaks and iOS Hacks' started by RRRize, Sep 10, 2011.

  1. RRRize macrumors regular

    Jul 5, 2008
    My 3Gs is jailbroken for over a year now and it's been pretty stellar until last week. The phone just dies out when battery gets down to 30%.

    Does anyone have any clues as to what I can do to resolve this?

    My iPhone specs are as follows:
    iPhone 3Gs 32GB
    iOS 4.0.1
    Baseband 05.13.04

    Any help much appreciated!
  2. IrishVixen macrumors 68020


    Jun 20, 2010
    Download BatteryInfoLite (free) from Cydia to determine just how far off your current charge capacity is from the design capacity. Batteries lose their ability to hold a full charge over time, and the built in display meter just isn't always accurate.

    If that's not the issue, BatteryDetective (same author, I think, but it's a paid app) might help you determine which app is causing the problem. While I haven't personally used it, others here recommend it highly.
  3. kbfr08 macrumors 6502

    Mar 16, 2007
    Just go ahead and replace the battery. Easy enough repair, just follow ifixit's instructions. You need to order a 3GS battery, not a 3G battery, even though they're identical, using the wrong battery will cause issues.

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