Okay, I got my MacBook Pro on July 6 and keep trying to calibrate it but can never get it to die at a time when I can leave it asleep for 5 to 6 hours! It's getting to the point of ridiculousness! Right now, I think I am the closest I've come, but I was hoping the battery would last until I go to bed tonight, but I'm all the way down to 17% at 5:55 pm so it ain't happening :-( Anybody have any suggestions? This is my only computer and I'm an online college student. I keep trying to get it to die at the right time, right before I go to bed so it can just rest while I sleep, but these batteries last so dang long I have just not yet figured out how to make that happen! LOL!