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That's pretty good going I would have thought? As well as charging cycles, I assume time is a factor. My Macbook Pro (bought July 2009) had reached 65% capacity by the time I replaced it, after something like 45 months and ~250 cycles. By then the computer had been begging me to replace it for about six months.

I actually thought this perfectly reasonable, with nearly 4 years being a fair lifespan for a battery, no matter how few cycles it might have been through. While it was obviously knackered, it still held enough charge to be perfectly useful, if not amazing - but perhaps I should have held it to a higher standard?

(Hopefully it's just this year's unusually hot UK summer but after a mere ten cycles its replacement is down to 93% already. So maybe there's just something up with the electricity supply to my flat.)




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