I recently got my 13" MBA 1.7/4/256GB model and I am not sure if its battery is behaving normally or not? My MBA battery discharges quite a bit when the laptop is completely turned off. I was out of town this weekend (4 nights) and before leaving I charged my laptop battery to 100%, turned it off and unplugged the magsafe power cable. However, when I returned back today and turned on my laptop, the battery was at 91%. It had discharged 9% during this period, even without the laptop being used. Is this the normal battery behavior of an MBA? This is my first Mac so I am not sure. Any suggestions?