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My friend's 11 mo MBP batter wouldn't hold a charge. He was told it went through too many cycles. Seems a bit soon to die to me. Shouldn't a batter last a full year even if charged several times a day?
Either way, at 11 months it is still under warranty. Battery life is linked to cycles, but no matter what the Apple warranty is 1 year. Make sure your friend gets the battery exchanged before the year is up.
Battery Lifespan
A properly maintained Apple notebook battery is designed to retain up to 80% of its original capacity at 300 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs.