OK, I've had my MBP for about 6 months now... how do the following numbers sound for my original MBP battery?: Original battery capacity: 5500 mAh Current battery capacity: 5101 mAh Battery loadcycles: 28 Age of your Mac: 6 months I've noticed lately that my MBP "goes to sleep" without warning when the battery gets low... it used to tell me when it was going on reserve battery power and had about 10 minutes left. Any ideas why it's not doing this anymore? EDIT: OK, it just went to sleep on its own, no warning, with 22 minutes remaining on the battery. Anyone know why this is happening and what I can do about it?