My battery went from 99% health to 95% within hours...

Discussion in 'MacBook Pro' started by orangeillini14, Jul 19, 2008.

  1. orangeillini14 macrumors regular

    Joined:
    Jul 1, 2008
    #1
    Yesterday I noticed my battery health was 95%. Today I noticed that it's at 95%. Should I be worried? I've had my MBP for a month and the lowest I've seen it go down was to 98%...
     
  2. tMac85 macrumors 65816

    tMac85

    Joined:
    Sep 15, 2007
    Location:
    in a great place
    #2
    Its very normal. The battery health will change and go up and down during use. Its normal. Now if it dips below 90 and stays, then you have a problem.
     
  3. dcains macrumors regular

    Joined:
    Mar 27, 2007
    #3
    Sure you're not talking about the charge? If so, that's normal, as it will fluctuate and the charger will kick in when it gets below 95%.
     
  4. CaptainChunk macrumors 68020

    CaptainChunk

    Joined:
    Apr 16, 2008
    Location:
    Tempe, AZ
    #4
    Normal behavior. Mine fluctuates between 95% and 99% health. Nothing to worry about.
     
  5. noodle654 macrumors 68020

    noodle654

    Joined:
    Jun 2, 2005
    Location:
    Never Ender
    #5
    Mine was at 90% last week and now its at 90%. I am starting to get worried.
     
  6. sttrek341 macrumors newbie

    sttrek341

    Joined:
    Jun 19, 2008
    Location:
    The OR
    #6
    don't worry about it, mine is only holding a 41% charge.
     
  7. alphaod macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    NYC
    #7
    LOL :rolleyes:

    Yeah my fluctuates around 94%/96%
     
  8. IBradMac macrumors 68000

    IBradMac

    Joined:
    Jun 27, 2008
    Location:
    Ohio
    #8
    Mine fluctuates a lot too. It has lost a % a day. I have kept it plugged in the whole time. The green light doesnt always stay on either. Not sure whats going on with mine. These batteries concern me as well. :eek:
     
  9. Zwhaler macrumors 603

    Zwhaler

    Joined:
    Jun 10, 2006
    #9
    My MBP is usually between 94-98. MacBook is always at 100%, even after 130+ cycles.
     
  10. orangeillini14 thread starter macrumors regular

    Joined:
    Jul 1, 2008
  11. Beau10 macrumors 6502a

    Joined:
    Apr 6, 2008
    Location:
    Downtown San Diego
    #11
    You might want to calibrate... after a couple calibrations mine stabilized @ 95% after 15 cycles (1st calibration was 5th cycle, 2nd 15th). Now it's at 94% after 102 cycles.
     
  12. Beau10 macrumors 6502a

    Joined:
    Apr 6, 2008
    Location:
    Downtown San Diego
    #12
    Remember that the health percentage is measured against what the battery is rated for as a spec, but in practice the actual capacity of a fresh battery can deviate from unit to unit. Your MacBook battery is surely down a bit from when new, it's just that you have a battery that started life significantly above spec.
     

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