Battery capacity dying faster than it should?

Discussion in 'MacBook Air' started by johnhalsted, Feb 1, 2011.

  1. johnhalsted macrumors member

    Nov 3, 2010
    I had my 13" for about 2 months and iv'e noticed the battery capacity is going pretty quickly, im already at 94%, is it worth taking it back to get replaced?

    Note: I have calibrated the battery once when it arrived and also do it once per month.

    original capacity was 6715
  2. johnhalsted thread starter macrumors member

    Nov 3, 2010
    loosing 3% capacity per month? so after 1 year battery will be about 64% after 400 ish cycles at my current rate. And i believe apple say if it goes under 80% capacity within 1 year and it has under 1000 cycles it gets replaced free.

    Just wondering if anyone else is having same problem?
  3. miles01110 macrumors Core


    Jul 24, 2006
    The Ivory Tower (I'm not coming down)
    Battery decay is not linear, depends on use/maintenance, and there is reporting error. You don't have a problem, it is normal.
  4. johnhalsted thread starter macrumors member

    Nov 3, 2010
    Its being used every day and i have been monitoring the total capacity weekly and it has been decaying steadily.

    Just also phoned apple and they said if its still going down in a month its going to get free replace :D:D
  5. vocabdude macrumors newbie


    Feb 1, 2011
    that's normal, even laptop batteries degrade with time and use, I have a acer laptop which when it was new lasted about 5 hours on battery power, now, after 2 years it doesnt even last 1...
  6. Over Achiever macrumors 68000

    Over Achiever

    Jul 22, 2002
    Toledo, OH, formerly Twin Cities, MN
    My battery health went down to 96% last month and today is back up to 98%, I think there are some reporting error involved. I wouldn't worry about it much right now.
  7. b-rad g macrumors 6502a

    b-rad g

    Jun 29, 2010
    Exact same thing with mine went down to 96% and now back up again.
  8. mattydee87 macrumors regular

    Aug 22, 2008
    Yeah my current MacBook Pro battery health often switches from between 86% and 92% all the time
  9. KPOM macrumors G5

    Oct 23, 2010
    I have used 16 cycles since mid-November and am still at 100%. That seems pretty rapid to be down to 94%. Let us know what happens.
  10. GGJstudios macrumors Westmere


    May 16, 2008
    Your battery is fine. As others have said, your battery health will fluctuate up and down over time. Calibrate your battery to make sure your readings are accurate.

    This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ

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