just got my new macbook pro 13 and have gone through messes with some of the system preferences and am downloaing some stuff. I dunno whether if is affecting it but my estimated batterly life says 2 hours and is around 90% now. I did fully charge it and have some other stuff on the background so...help? Also, i've read that people have it charged for maximum batterly life so, what do you guys do? if you can charge it, do it or if its around 60% or something it should be charged?