Erratic/dying battery

Discussion in 'Mac Basics and Help' started by zacl87, May 5, 2010.

  1. zacl87 macrumors member

    Sep 19, 2009
    My battery was functioning perfectly up until today, the last time I looked at coconut battery it was around 95% capacity with like ~500 cycles. Then today it's struggled to hold 2 hours of charge, coconut battery now says 57% capacity.

    The strange this is, earlier today it seemed to have gone back to normal, I looked at CB and capacity was back up to 95%. I tried calibrating it and it's all over the shop. About 2 minutes ago I received the 9 min low battery warning, now it's plugged in and says it only has to charge for 49mins to regain a full charge.

    I guess it sounds like it's dying, it's at 616 cycles which is fair enough. Lately (last 4/5 months) I've been keeping it plugged in most of the time though which I hadn't before and I'm thinking that's perhaps killed it faster.

    Anyway is there anything else I can do before replacing it? Or a more comprehensive way to evaluate its health?

  2. Patrick J macrumors 65816

    Patrick J

    Mar 12, 2009
    Oporto, Portugal
    Apple will replace the battery if it goes below 80%, if you are under a certain number of cycles.
  3. zacl87 thread starter macrumors member

    Sep 19, 2009
    Just had a look and it's <300. Oh well, 600ish is a lot and I can get a battery pretty cheap off ebay anyway.
  4. zacl87 thread starter macrumors member

    Sep 19, 2009

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