• Looking to buy a new battery for my early 2011 Macbook Pro. I downloaded a battery monitor app to confirm the belief that the battery is past it, but according to this app the health of the battery is at 99% - 6746 mAh. In my experience the charge holds for less than an hour, so is my battery shot or not? Note, I've not owned this machine from new and it was refurbished (not by Apple).

    Also, I've found various batteries at various prices from £100 down to £20. Is it worth spending big? I only want a few hours of charge.

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