recently i purchased a brand new battery from ifixit.com. The battery was almost 3 times as expensive as what they were asking for the same new battery on ebay. However I thought I was paying for a true oem battery not a knockoff that would die shortly after. The battery is at 93% health after only 3 cycles. For reference my macbook air is at 92% health with 150 cycles. Ive checked the battery both with cocunut battery and istat and they both report the same results. 93% health after only 3 cycles. AFter emailing "tech" support the only thing they did for me was tell me that it needed 2 months to "calibrate" itself. note this is complete non sense all macbook batteries after 2009 come precalibrated as stated by apple. There is obviously something wrong with the battery and ifixit wont do anything about it. so anyway dont buy from them unless you want a battery like mine that will be completely useless in 4 months.