So, my battery was 99% yesterday, it never went to 100%. So I discharged it till 20% and started charging overnight. Today morning, it was 100%. About an hour ago, the MBP went to sleep (plugged in). When I started it back up again, I saw the battery level was at 99% (it was plugged in). After 2 hours, it's still 99%. I don't think it will goto 100% until I discharge to like 50% and charge it again. Is it a bug in OS X that shows 99% instead of 100% after coming back from sleeping OR is my battery defective?