Battery cycles

Discussion in 'MacBook' started by Hazzarell, Dec 2, 2010.

  1. Hazzarell macrumors newbie

    Oct 24, 2010
    Hey people.

    Just a quick question. My Macbook's battery has done 902 cycles and is on 92% health. I was just wondering - even though I know it's impossible to predict the life-span of a computer battery - a) how accurate that reading is (I use the iStat Pro widget) and b) ignoring the health reading, is it time to buy a new battery when it hits 1000 cycles?

    The health has gone down from 100% to 92% in the space of about 3 months? Maybe more. Is that a sign that I should change it?

    Thanks in advance. :)

    - Hazzarell
  2. iphone1105 macrumors 68020


    Oct 8, 2009
    Honestly, I bet you get another good year out of your battery!
  3. GGJstudios macrumors Westmere


    May 16, 2008
    First, if you haven't calibrated properly, your readings may be off. Second, as long as your battery is working, there's no need to replace it, simply because it has a certain number of cycles on it. Your battery health will fluctuate over time. It's normal.

    This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ
  4. Richard1028 macrumors 68000

    Jan 8, 2009
    1000 cycles... you guys are spoiled.

    My lowly 2008 model needs a new battery every 8-9 months.
  5. Hazzarell thread starter macrumors newbie

    Oct 24, 2010
    Wow. That was quick!

    Thanks guys. I'll have a read through of that FAQ.

    - Hazzarell

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