Arrived with 52% charge, capacity 4593 mAh of 4680 mAh. 98% health, manufacture date of the iFixit replacement battery is Feb 4 2012 (2.9 years), with 0 charge cycles. My order arrived extremely fast, and replacing the battery itself was easier than expected. Overall speed of my MBA seems to have improved somewhat as well. Despite my MBA mid-11 being almost 3.5 years old, the internals, fan included, were all fairly free from dust. So far, so good.