Battery at 99%

Discussion in 'MacBook Pro' started by maggie820717, Jul 16, 2012.

  1. maggie820717 macrumors newbie

    Joined:
    Jul 16, 2012
    #1
    Hey guys, just wondering... is it normal to have my battery at 99% with the AC adaptor plugged in (but not charging)? b/c i left it plugged overnight but my MBP was off. It was at 100% before.

    i just got my MBP a few days ago, and i calibrated my battery already.

    Thanks! :)
     
  2. awer25 macrumors 65816

    awer25

    Joined:
    Apr 30, 2011
  3. Auzburner macrumors 65816

    Auzburner

    Joined:
    Apr 11, 2008
    Location:
    Syracuse, NY - USA
    #3
    Yep that's normal. It won't charge until you're around 95% from what I recall.
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    It's normal that your battery may stop charging between 93-99%. For details, read the CHARGING section of the following link.
    The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries.

    This should answer most, if not all, of your battery/charging questions:
     
  5. maggie820717 thread starter macrumors newbie

    Joined:
    Jul 16, 2012
    #5
    Oh i see. Thanks guys! :)

    Also, is there a way of changing the charging threshold to like 90%?
     
  6. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
    No. Mac OS X manages the battery without the need for user interference. Just run on battery whenever you need to and plug it in whenever you can. You can plug or unplug at any time, regardless of the charged percentage. Just make sure you don't run on AC power all the time, as your battery needs to be used regularly to stay healthy.
     
  7. Auzburner macrumors 65816

    Auzburner

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    Apr 11, 2008
    Location:
    Syracuse, NY - USA
    #7
    Nope. Not easily.
     
  8. Sparky9292 macrumors 6502a

    Joined:
    Aug 1, 2004
    #8
    Yes, i just got my non retina MBP yesterday and wondered the same thing (I was worried I had a bad battery).

    Read this link: http://support.apple.com/kb/TS1909
     
  9. Prof. macrumors 601

    Prof.

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    Aug 17, 2007
    Location:
    Chicago
  10. IceAero macrumors newbie

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    Jun 15, 2010
  11. heyimandy macrumors member

    Joined:
    Jun 12, 2012
    Location:
    Toronto, ON
    #11
    Yeah Apple does this with all of their products. It's basically protecting your batter life by not going quite to complete cycle, so it's not over charging and damaging.
     
  12. gentlefury macrumors 68030

    Joined:
    Jul 21, 2011
    Location:
    Los Angeles, CA

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