Mountain Lion shows 99% battery even if fully charged

Discussion in 'OS X Mountain Lion (10.8)' started by RichardF, Aug 4, 2012.

  1. macrumors 6502

    Anyone else?

    Did a clean install of ML and now the battery is stuck at 99% even when fully charged.

    Also, does anyone know how to properly move the files/ folder of Mail.
    Having done a clean install and without having opened Mail or set up account in Settings > Mail, Contacts & Calendars - I would like to copy everything I need to get Mail the way it was in 10.7.4 prior to my clean install of ML.

    Thank you in advance.
  2. macrumors demi-god


    Yep. I have my MacBook Pro 13 (late 2011) plugged in all the time and the battery always says 99%. Who knows why.
  3. macrumors member

    suffer the same in lion and mountain lion alike
  4. macrumors 68030

  5. macrumors demi-god


    It's normal that your battery may stop charging between 93-99%. For details, read the CHARGING section of the following link. This should answer most, if not all, of your battery/charging questions:
    The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries in older Apple notebooks.
  6. macrumors 68030

    Oops, missed his computer in the signature.
  7. macrumors 6502

    Thank you guys.

    I unplugged my MBA and used it down to about 60%. Not fully charged and it does show 100%. All is well.

    Any ideas on how to copy over the files/ folders Mail needs? Please my OP.
  8. macrumors 6502a

    This is not a ML issue. All versions of OS X I've used have done this from time to time.

    My battery is showing as 98%, but it is fully charged.
  9. macrumors 6502a

    I feel like this guy has posted this 100 times this it just me?
  10. macrumors demi-god


    Only as many times as people ask the questions, sometimes less (I don't answer them all.)
  11. macrumors 6502

  12. macrumors demi-god


    See post #5 for details.
  13. macrumors newbie

  14. macrumors demi-god


    No, 99% is not the max. See post #5.
  15. macrumors member



    Stop asking this! It's been discussed so many times, there are several articles on the subject!

    It has always been this way and the reason for it is that its not good for the battery too be fully charged, so Apple has an algorithm which stops the battery from being charged to the max. Try making a search for the article, it explains it very well.

    Long story short, its not a bug, its supposed to be like this, and it always has been.
  16. macrumors 6502a

    It's still full.

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