I just thought I'd see if I could clarify a minor point regarding the batttery calibration process listed here: http://support.apple.com/kb/HT1490 After the laptop has been resting in its fully charged state for two hours and one disconnects the power adapter, is it permissible to allow the laptop to sleep at any point during the complete drain of the battery? i.e. could I disconnect my MacBook Pro in the morning while its sleeping and use it over the course of a day, putting it to sleep at various points, and then complete the drain of the battery in the evening? Or does the laptop have to be properly on from the start and during the entire drain of the battery? Thanks for any help.