Battery life

Discussion in 'MacBook Pro' started by sionharris, Dec 3, 2006.

  1. sionharris macrumors regular

    Oct 29, 2006
    Is it best to leave my computer on or off and plugged in or on the battery? My last iBook had a battery life of about 12 minutes after a year or two, so I am keen to avoid this happening again if possible.
  2. poppe macrumors 68020


    Apr 29, 2006
    Woodland Hills
    Did you/do you calibrate your mac batteries?
  3. sionharris thread starter macrumors regular

    Oct 29, 2006
    It arrived about a week ago and I will be calibrating it for the first time today, then once every month or two after that.

    I never did it for the iBook (wasn't my computer, I just used it a lot and left the maintenance to other people).

    Any advice re: my original two questions?
  4. Applespider macrumors G4


    Jan 20, 2004
    looking through rose-tinted spectacles...
    Leaving it on (sleeping) and plugged in shouldn't do much harm to your battery. Your battery has a finite number of charge cycles - if it's above 95% then you won't be charging it having it plugged in.

    I run mine plugged in the majority of the time. It's coming up for 3 years old and I still get just over 2 hours on the original battery :D
  5. sionharris thread starter macrumors regular

    Oct 29, 2006
  6. sepu macrumors regular

    Nov 18, 2006
    hey guys ,,, how do you calibrate your battery ?
    I just got mine new Macbook Pro 2.33 like 4 days ago ...
    can anyone point me out how to do that ? Thanks
    I already on my 2 cycle ... so Im guessing the more cycle the worst the battery gets right ?

    I use my MBP C2D plugged it all the time that shouldnt be a problem. Im guessing.

  7. scott523 macrumors 6502a

    Sep 8, 2006
    Saint Charles, MO
    Calibrate your battery:

    And yes eventually every cycle is a tiny step to a dead battery. :rolleyes:

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