MBA mid 2011 Battery health

Discussion in 'MacBook Air' started by ChrisOs, Aug 25, 2011.

  1. ChrisOs macrumors newbie

    Aug 25, 2011
    Hey guys,

    I just bought a MBA 13" I5 3 weeks ago and experienced a significant drop in battery health. I started with 98% according to Coconut and IStat which was strange to beginn with but then it went down to 93% and is now at a constant 95%.
    I tried recalibrating it twice but it doesn't really help.
    Furthermore Coconut says my battery is already 28 weeks old which also makes me wonder...
    Anybody experiencing similar battery health/age?
  2. TheRealHershey macrumors member

    Jul 20, 2011
    Similar. Back up to 97% at the moment, but was down to 95% the other day; this is better than my MBP was doing at the same age (it was down to 89% within the first month).

    Mine also says 28 weeks old. Makes me wonder when they built these...Haha.
  3. ChrisOs thread starter macrumors newbie

    Aug 25, 2011
    Haha I think they gave us the leftovers from the 2010 MBA! Will you do something about it?
    An apple salesclerk told me the other day that battery health should actually be around 100% +-1% after such a short period of use and in my case 10 cycles.
  4. ZipZap macrumors 603

    Dec 14, 2007
    Since Apple has some pretty clear rules on battery replacement I think you will just have to live with it (unless you are in your 14 day period).

    You're still in the 90's and well...that's not really much of an issue.
  5. coopiklaani macrumors member


    Aug 12, 2011
    Do you usually calibrate it? My MBP battery heath dropped to 82% after 120+ cycles and went back to 90% after a calibaration.
  6. GGJstudios macrumors Westmere


    May 16, 2008
    It's perfectly normal for your battery health to fluctuate up and down over time. This should answer most, if not all, of your battery questions:

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