Just got my new 13" MBA a couple days before xmas, 2 weeks ago to the day. I love it and have already been raiding the app store. Picked up this battery health app, and two days ago, it told me the overall battery health was 98.1 and now it's telling me it's 97.3%. I had a problem with an old powerbook's battery dying (it held 0 charge) and, looking at these numbers, i'm starting to worry already. Should I be concerned? Are these numbers "probably" accurate? Thanks.