New iPad only charges to 99%?

Discussion in 'iPad' started by Cutwolf, Apr 12, 2012.

  1. Cutwolf macrumors 6502

    Joined:
    Oct 11, 2010
    #1
    Put it to charge at night from about 60%. 9 hours later go to use it and it's at 99%.

    Sup with that?

    (I tried searching but searching for 99% doesn't work)
     
  2. netnothing macrumors 68040

    netnothing

    Joined:
    Mar 13, 2007
    Location:
    NH
    #2
    Let it drain until it powers off and try charging again.

    -Kevin
     
  3. mcdj macrumors G3

    mcdj

    Joined:
    Jul 10, 2007
    Location:
    NYC
  4. Wide opeN macrumors 6502

    Wide opeN

    Joined:
    Aug 27, 2010
    #4
    Mine did this too last night when I took it off the charger.

    Come on people, talk to me!!!
     
  5. BaldiMac macrumors 604

    BaldiMac

    Joined:
    Jan 24, 2008
    #5
    It's likely just a calibration issue. See post #2.
     
  6. aristobrat macrumors G5

    Joined:
    Oct 14, 2005
    #6
    http://www.macrumors.com/2012/03/27...-continued-charging-beyond-100-battery-level/
     
  7. Rob9874 macrumors 6502

    Joined:
    Jul 19, 2010
    #7
    This is from the Power Maintenance interface on my ThinkPad at work. This is where I learned about maximizing battery life through varying max charge thresholds.

    "Battery deterioration may occur faster if the battery is constantly charged at 100%. Lowering the charge thresholds for your battery, periodically resetting the battery gauge, or using Maximum Lifespan mode will help increase its lifespan."

    My work laptop is always plugged in, yet my battery % varies between 95% and 100%. Sounds like Apple took a similar approach with the iPad.
     
  8. MykullMyerz macrumors 6502

    MykullMyerz

    Joined:
    Dec 6, 2006
    Location:
    Washington, D.C.
    #8
    This has happened to me before but I just power off the iPad and power it back on and the battery meter is at 100%.
     
  9. Stealthipad macrumors 68040

    Stealthipad

    Joined:
    Apr 30, 2010
    #9
    I would get it replaced as soon as possible. Today 99%, tomorrow 50%:eek:
     
  10. dsquared81 macrumors 6502

    Joined:
    Apr 11, 2010
    Location:
    Orange County
    #10
    If after a few cycles and it's still reading 99%, I'd try a restore and setup as new
     
  11. aristobrat macrumors G5

    Joined:
    Oct 14, 2005
    #11
    According to Apple, it charges to 100%, then it lets the battery drop a little lower, then it charges back up to 100%. This cycle repeats. See post #6 above.

    So depending on when YOU look at it, it may be at the point where it's discharged a little, and 99% would be normal.
     

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