Ok, so I didn't calibrate on the first charge but I did it on the 3rd day of owning my MBP. I followed all the instructions and left it playing iTunes when I was at work to sleep/shutdown. The reason I did that is because the battery was taking forever to die (not a bad thing ) and I wanted the 5 hours of downtime to be when I was at work so I could use it when I got home. I turned it on when I got home and saw the last file played was from 3 hours ago. Will it still calibrate if I didn't wait 5 hours? (I would have waited but didn't know how long it had been off) And after calibration I had to restore the MBP to the previous day because I messed some stuff up. Does that mean I need to calibrate again?