i don't know i keep mine plugged in all the time and i still have a 100 percent after nearly 10 months but I have only 47 cycles. haha its plugged in right now.
Can't complain... almost 4 years, 145 cycles (105 on my other battery) and 85% left on both... I don't think I've even done a re-cal on either battery since I first got the computer... Might have to try that this weekend.