MBP Battery Health is wrong?

Discussion in 'MacBook Pro' started by Simo1122, Dec 7, 2009.

  1. Simo1122 macrumors member

    Simo1122

    Joined:
    Jan 28, 2009
    #1
    Hi All,
    I'm having issues with my MBP battery.

    The battery has had 302 charge cycles and has a 96% health reading.

    When i first got the computer 12 months ago I could nearly hold 4 hours of power and now it will only hold just over 2 hours...So why would my battery health be at 96% when the battery is only lasting the equivalent of 60%?

    I can understand why the battery would have a low health after 302 charge cycles but since health claims to be at 96% I should be getting around 4 hours still....Any suggestions/reasons?
     
  2. Simo1122 thread starter macrumors member

    Simo1122

    Joined:
    Jan 28, 2009
    #2
    Done the calibrate as it says on the apple website, health is 95% but it still lasts just over 2 hours (2:20)
     
  3. firesong macrumors member

    Joined:
    Jul 13, 2007
    #3
    The same thing for me... When I first got the MBP, it was capable of doing 4.5hrs if not 5.

    Now it barely lasts 3. Same kind of usage. 214 charge cycles clocked and a 94% health rating.
     
  4. Simo1122 thread starter macrumors member

    Simo1122

    Joined:
    Jan 28, 2009
    #4
    To add to this, would it be normal if my computer is pretty much idle and drawing Amperage (mA): -1482 ???

    Because thats what it's doing.

    7200 RPM HD probably effects that a little but not that much!

    CPU usage is low....I might try reinstall...
     
  5. breatheasy macrumors member

    Joined:
    Mar 9, 2010
    #5
    Do any of you have the hi-res screen? perhaps that affects the battery life somewhat.

    My Hi-res 2.4 15" i5 amperage, with just this open at half brightness with the backlit keyboard off is -1044.

    I've never had the battery indicator tell me that I will get more than 7 hours.

    EDIT: This comment was supposed to go in a different topic. I am a fool.
     
  6. Simo1122 thread starter macrumors member

    Simo1122

    Joined:
    Jan 28, 2009

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