I have a 2009 13" MacBook Pro that I bought in late February, 2009. The battery has 319 cycles and is at 82% of its original capacity. I remember reading that the unibody MBPs were designed to maintain 80% of the battery capacity up to approx. 1000 cycles. Given that mine is almost down to 80%, and my AppleCare runs out at the end of this coming February, do you think it's worth my take to take it to Apple and see if they'll replace the battery? Thanks for your help.