I have a June 2009 15" Macbook (5,4). I've had it for approximately 26 months now and in that time have accumulated 462 battery cycles. The thing is my battery health is at around 66% (4321/6500). I find this a little troubling after reading about people online have 80%+ after 500 cycles. According to the Apple website a replacement battery would run me $200+tax in Canada. I only seem to get about 2-2.5 hours of battery life compared to the 4-5+ I used to get. Is this behaviour a little odd or is it normal and should I pull the trigger and get a new battery (the MBP is used throughout the day on campus and 2.5 hours is just not long enough). Also is there any way Apple could replace it for free if this behaviour is not normal.