Hi I just purchased a new Macbook Pro (2,4GHz i5 320Gb) but the battery lasts about 5h and I was not doing anything more than browsing with WI-FI and editing text files. In the specification says that it should last 8-9 h. Does anybody have any idea if I could return the laptop with the reason that I am not satisfied? Is it enough? Anybody had any similar experience? I do not know if it matters but I bought it from a Apple Premium Reseller shop. Thanx, Granit