iPhone 4 battery drain WHILE plugged in?

Discussion in 'iPhone' started by rye9, Sep 6, 2010.

  1. rye9 macrumors 65816

    rye9

    Joined:
    Sep 20, 2005
    Location:
    New York (not NYC)
    #1
    I plugged in my ip4 last night a couple hours before going to bed, and noticed that it was up to 100% when I went to bed. I woke up and, still plugged in, was at 97%...?

    Is this normal by any means? I mean, I know my MBP which I always have plugged in will drop charge while plugged in to such %'s (97,98,99)... however my ip4 has never done this before.
     
  2. BUFFBOY macrumors regular

    Joined:
    Aug 23, 2010
    Location:
    Sydney
  3. lvyelion macrumors member

    Joined:
    Sep 27, 2008
    Location:
    NL
    #3
    modern Li-on or Li-Polymer battery have build-in logic board to control charging. It will automaticly disable the charge when the battery is full, and as a protect function to preserve the lift of battery, it will not charge when the battery falls below a certain percentage, lets say 95%. So even if you plug-in all time, you can still loose battery
     
  4. PNutts macrumors 601

    PNutts

    Joined:
    Jul 24, 2008
    Location:
    Pacific Northwest, US
    #4
    I haven't seen this on mine. I typically plug mine in at night and in the morning it is always 100%.
     
  5. Subwaymac macrumors regular

    Subwaymac

    Joined:
    Apr 1, 2009
    Location:
    Illinois
    #5
    I have had this happen while watching movies on netflix app but never when it was idol at screen lock.
     

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