Today, I replaced for the second time the battery of my Macbook Pro. The battery had 560 reload cycles. Apple's documentation states that normally a battery should be able to deliver about 800 cycles before replacement is needed. I got my (now iconic) Macbook Pro beginning of 2007 and this is already the second time I have to replace the battery. So with my (heavy) usage the battery worked for two years. The new battery is again made in 2006. So problem's again in 2013 ? Or will I have a new Macbook Pro with a fixed battery by then ??? Maybe I have to recalibrate my battery more often.