Originally Posted by HarryWarden
It is brand new and according to the MBA settings, currently sits at 0 cycles. Seems odd that it wouldn't be at 100%. Just a mistake in the software?
It is perfectly normal if your battery health (maximum capacity) is more or less than 100%, even when brand new, or if it fluctuates up or down over time. For further details, read the CHECKING STATUS AND HEALTH section of the following link.
The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.
Apple Notebook Battery FAQ