Hi. I bought a macbook pro from NYC, apple store 2weeks ago. And returned to my hometown, Istanbul (turkey). My problem is; After a full charge, battery shows at most 2:00 hours of life, where it has to be 7hours. What should i do? i'm not going back to nyc until september. and i'm not sure if i can change it here in istanbul. if i can't change, what's this problem about, and what can i do about it? or; can i change it if i should? -Utility information- charge remaining (mAh): 6287 full charge capacity (mAh): 6879 cycle count: 15 condition: normal thank you verymuch.