Just curious - what is your experience with the longevity of the batteries Apple puts in MacBook Pros? I've got a 15" mid 2009 model, which was the first one with the non user serviceable battery, which Apple advertised as keeping 80% of its charge after 5 years of use. As you can see, I didn't use it too much, and the capacity already dropped to 70% after just three years of use. Now it's down to 15%, or about 40 minutes of real world browsing use. I'm using this machine as a stationary browsing device mostly nowadays, so it doesn't really bother me, but did anyone experience better longevity? I'm a little worried since it's even harder to replace the batteries of the newer models -- how much does Apple currently charge for a battery replacement in a current 15" MBP?