How do I recalibrate my Battery?

Discussion in 'Mac Accessories' started by Collin973, Sep 3, 2006.

  1. Collin973 macrumors 6502

    Joined:
    Mar 29, 2006
    #1
    How do I do it? Is it a program I need.

    Thanks
     
  2. EricNau Moderator emeritus

    EricNau

    Joined:
    Apr 27, 2005
    Location:
    San Francisco, CA
    #2
    No, it's not a program.

    Which notebook do you have?

    EDIT: Here's a support article that describes how to do it on both types of Apple notebooks. :)
     
  3. mkrishnan Moderator emeritus

    mkrishnan

    Joined:
    Jan 9, 2004
    Location:
    Grand Rapids, MI, USA
    #3
    I didn't realize the procedure had changed for the newer models... good to know. It's interesting that you really have to kill the battery to get it to calibrate on those.
     
  4. Collin973 thread starter macrumors 6502

    Joined:
    Mar 29, 2006
    #4

    Thanks. My tibooks battery has been draining super quick today. Like it last only an hour or so and then it's done. It wasn't like that before.
     
  5. mkrishnan Moderator emeritus

    mkrishnan

    Joined:
    Jan 9, 2004
    Location:
    Grand Rapids, MI, USA
    #5
    How old is your battery? Hopefully a calibration will help, but it does have a finite lifespan. After you calibrate and recharge, open Apple Menu -> About This Mac -> More info and then click on the power entry. You'll see a max charge capacity number. That number is in mAh. You can find the original rating of your battery (probably about 4000?) online and see what the current capacity is by dividing the current number by the original number....
     

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