Okay, I just had a weird experience with my macbook battery. I was using a True Power (Fastmac) battery until it stopped working properly and so I sent it back to get a replacement. So I was forced to use my OEM battery that I bought the macbook with originally. The battery has 222 cycles and only lasted for about 1 hour on average. The health was about 42%. After one day of using the battery the battery health went all the way back to 84% and now my battery life is about 3:30 hours when charged. The battery never lasted this long before i got my True Power battery (the reason I replaced it in the first place). Has this ever happened to anyone else? I mean, I didn't use the battery for about 5 months, started using it again, and the battery life goes up by 2 1/2 hours??? That's almost unbelievable! I used coconut battery to check the capacity of the battery when it was at 42% and the battery capacity was around 2000mah and now at 84% the battery capacity is at 4200mah. This is the coolest weird thing that has happened to my macbook. Any thoughts on why this may be so?