Guys, I picked up my 2011 13" MBA just last week and the batter capacity has decreased to 96% (6468mAh out of 6700mAh max) per Coconut Battery 2.7. It never got to 100% Battery Health and stayed at 99% for about 3 days then it started to drop. I've properly cycled it twice already by running it down to complete shut down and doing a full charge. My MBP is still at 99% health after 14 months of use. I will say that I've used the different MagSafe chargers on it...the one for my MBP and MBA that came in the box. I don't know if it affects the battery. I imagine that Apple expects people to do this. I don't want to exchange it and end up with a Toshiba SSD. Thanks for you feedback.