Hi guys, there's probably a thousand threads about this, but I have searched and didn't find what I was looking for. So anyway, what battery life should I be getting on a quadcore (2.3ghz) i7 Macbook pro with normal usage. I think I'm getting 4 hours at most. The Macbook is second hand but it isn't really old (coconut battery says 19 weeks and 75 battery cycles, which where 16 and 55 or so when I got it.). Right now I'm on 64% and it says I have 2:46 left. What battery lifes are you guys getting?