Losing 25% battery overnight, every night?

Discussion in 'iPhone Tips, Help and Troubleshooting' started by maximus06, Dec 1, 2010.

  1. maximus06 macrumors regular

    Nov 5, 2007
    I've just about had enough of this, I've tried everything! Restored my iPhone 4 on 4.2.1 to default settings and just synced my apps onto it - and still, I lose 25-30% battery every night (~10 hours) while the phone is in standby.

    It is NOT jailbroken. There is no app running in the background. Data and 3G are OFF.

    Have tried to drain it completely and then recharge to make the battery accurate - doesn't help. I guess I'll need to call it in?
  2. ryanrich macrumors regular

    Nov 16, 2010
    Cape Town, South Africa
    Sounds like the battery is definitely unhealthy...
  3. Gli.Azzuri macrumors member

    Sep 22, 2010
    Ah this doesnt sound good. Try DFU mode and if that doesnt work then im afraid its a hardware failure... and that means replacement.
  4. jabuka macrumors newbie

    Nov 7, 2010
    In my case data transfer (even when not using email or internet) was the cause. After I installed Push Doctor via Cydia the problem was solved. Worth trying for sure.
  5. maximus06 thread starter macrumors regular

    Nov 5, 2007
    But how could it be, even after restoring firmware and no JB? May give this a try.
  6. Pez555 macrumors 68020


    Apr 18, 2010
    location settings on? bluetooth?

    if the answer is no, sounds like your battery may be defected. Replacement!
  7. maximus06 thread starter macrumors regular

    Nov 5, 2007
    So I turned off WiFi before going to bed...and low and behold the battery remained unchanged the next morning (lost maybe 1% at most).

    So not a hardware defect after all. Will continue my testing.
  8. Nachos macrumors member


    Dec 1, 2010
    Lynge, Denmark
    All my iPhones, including my iPhone 4 did that until I let it charge for 24 hours straight turned off. That fixed it.
  9. poohbear19 macrumors regular


    Nov 29, 2010
    FL, USA
    no dip :cool:
  10. applefanDrew macrumors 65816

    Jul 17, 2010
    Do you use it as an alarm? I've found that when I have an alarm set...the battery drains like crazy. I lost 14% in one night with an alarm on. When I don't set an alarm, I lose nothing overnight
  11. OutThere macrumors 603


    Dec 19, 2002
    I find that the quality of cell service I have has a big impact on overnight losses. With full service I'll lose maybe a couple percent, at home where I have 1 bar or "Searching..." from where my phone sits I'll easily lose 15% overnight. I just plug it in overnight.

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