battery capacity changing everytime

Discussion in 'MacBook Pro' started by jpma, Feb 26, 2010.

  1. jpma macrumors 6502

    Joined:
    May 31, 2009
    #1
    Hi All,

    I've got the latest 15'' 2.8Ghz mbp
    I'm just wondering is it normal for others regarding my
    battery showing 99% after a week of using it(new)

    i know about the cycle thing.
    usually let it drop to 90% or so then charge it back up.

    done calibrate few times already.

    the current full capacity shown on coconut battery is 6435
    it used to be 6554 the first time I got this computer.
    after 2 weeks it drop to 6444.

    seems like it's dropping little by little
    and overtime I used the battery(unplug)
    the full capacity of the battery will drop alittle.

    is this normal?
     
  2. iBookG4user macrumors 604

    iBookG4user

    Joined:
    Jun 27, 2006
    Location:
    Seattle, WA
    #2
    How many charge cycles are on the battery? And calibration should only be done about once a month, usually you'll want to plug in your battery at around 20-30%.
     
  3. jpma thread starter macrumors 6502

    Joined:
    May 31, 2009
    #3
    6 cycle now
    calibrate once a month.

    so it's common to have the full capacity changing all the time?
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    Yes, your battery health and capacity will change from time to time. It's quite normal and nothing to worry about, unless it drops significantly.
     
  5. iBookG4user macrumors 604

    iBookG4user

    Joined:
    Jun 27, 2006
    Location:
    Seattle, WA
    #5
    99% is fine after 6 cycles. And yes, you're fine using it to 20-30% and then charging it. Although what you don't want to do is use it to 0% excessively and calibrate it too often.
     
  6. jpma thread starter macrumors 6502

    Joined:
    May 31, 2009

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