Battery Trouble?

Discussion in 'Mac Basics and Help' started by eightiesbaby, Feb 22, 2009.

  1. eightiesbaby macrumors newbie

    Joined:
    Feb 15, 2009
    #1
    Hello, I recently noticed that my battery percentage increases than decreases a lot and within a short period of time... maybe even a minute.
    1 minute it will say I have 4:17 left, and the next it will be 4:02... then it will go up to 4:22 etc.. etc..

    Could there be something wrong with the battery or is it just changing after I do something.. for example.. if I open up Itunes and start listening to music.. it will be lower.. and when i shut it down.. it will go back up again?

    Also, I've heard you should calibrate the battery every month or so... but I don't really understand how you do it.

    Thanks! :)
     
  2. albion-bh macrumors newbie

    Joined:
    Jan 4, 2008
    #2
    yes it's like average miles per gallon. If you go down hill it can go to 200+ miles per gallon . . .but hill soon ends the same if you go up hil - it goes down.

    So yes on usage.

    Not sure about battery "calibration"
     
  3. r.j.s Moderator emeritus

    r.j.s

    Joined:
    Mar 7, 2007
    Location:
    Texas
  4. DeusInvictus7 macrumors 68020

    Joined:
    Aug 13, 2008
    Location:
    Kitchener, Ontario
    #4
    Yeah, basically that time display on the battery just shows an estimate, based on what you are doing, and based on CPU usage, screen brightness, everything that has a factor in determining battery life...it will fluctuate a lot.
     

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