After having my MBP for about a month I let it die down all the way into sleep mode, like Apple recommends, and let it stay like that overnight from about 12:30 until 9 am or so when I woke up. From that point I let it charge fully throughout the day while I was in my classes. However, when I turned it on this evening to use it, the time that shows how much time is left on the battery charge started moving drastically and sporadically up and down. It would go from 9 hours to 6 hours and then to 4 hours then to 2 hours and vice versa along with numerous random minutes beside those hour times. ie - 9:31 and then went down to 6:42. Did I do something wrong with the calibration? Have I ruined anything with my computer and/or battery? I called Apple and they had me bring up system profiler and everything seemed okay, but it still bothers me that the time is still doing this. Even if I switch it to percentage, there's still a nagging thought that I know it's still doing that.