OSX shows battery at 100%, Bootcamp at 96% .. What?!?!

Discussion in 'MacBook Pro' started by entraik, Aug 25, 2012.

  1. entraik macrumors 6502a

    Joined:
    Jan 22, 2009
    #1
    Okay so i'm in OSX now, and battery is 100% charged while the charger is in. I switch over to bootcamp and it's at 96% (plugged in, not charging??). Why am I getting different battery readouts and why is it only charging up to 96% in bootcamp and not 100%?
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    Battery readings are only estimates and not 100% accurate. I wouldn't worry about it.
     
  3. jeffmorr macrumors member

    Joined:
    Jul 27, 2008
    Location:
    Montreal, Quebec, Canada
    #3
    Are you using a Retina MacBook Pro because I've seen issues similar to that using iStat Pro on my dashboard?
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    That's been discussed in a few threads. There appears to be a slight discrepancy (roughly 5% difference) between 3rd party apps and ML in reporting battery charge percentage. I expect future updates to iStat Pro and other apps will correct this.
     
  5. Idefix macrumors 6502

    Joined:
    Jul 10, 2012
    #5
    http://support.apple.com/kb/TS1909

    Quote:

    Note: PowerPC-based computers may stop charging between 95 and 99 percent; Intel-based computers may stop charging between 93 and 99 percent.

    Resolution

    This is normal. The batteries used in these computers are designed to avoid short discharge/charge cycles in order to prolong the overall life of the battery.

    When setting the Mac OS X battery status menu bar icon to display charge state by percentage, you may notice that the reported charge stays between 93 or 95 percent and 99 percent.

    The adapter will not charge the battery to 100% automatically if it will add additional wear to the battery.
     
  6. thermodynamic Suspended

    thermodynamic

    Joined:
    May 3, 2009
    Location:
    USA
    #6
    You beat me to it, annd Dell and other PC makers utilize the same concept.

    What's going on is absolutely normal.
     
  7. thejadedmonkey macrumors 604

    thejadedmonkey

    Joined:
    May 28, 2005
    Location:
    Pa
    #7
    So in other words, its another shining example of apple superb windows drivers :S
     

Share This Page