I have the latest 2.4ghz MBP bought in march, I noticed last month that it would only charge to 4 hrs as soon as I unplugged it it dropped to 310 in five minutes ( just internet and Word(. so I went there complained and got a new battery. THe phone support said I should see a six hour charge when fully charged. With the new battery it got me to 552, and then fell very fast. What is the average time on the new battery. PS I tried to recalibrate the battery letting it charge, then drain, then left it drained for six hours then fully charged again but that made NO DIFFERENCE IN THE TIME> it still seems to only fully charge to 4:30min.