From what I have read I guess I am doing pretty well and the battery is just DONE. Currently with my Istat pro it lists the battery as: 31% Health, 621 Cycles, 44% Charge, Minutes remaining 21. I have taken extremely good care of this battery since new, Jan 2007. Just put a new HD in, I think rpm's were the same. Did some work on Itunes and now 2 days later the battery is junk. Before I go drop some money on a new one I wanted others comments on the situation. I have done the recalibration several times through the life of the computer. Any help is greatly appreciated, as well as the best priced place to buy a new one.