So, I've been absolutely impressed with the battery my MBA 13". It gets almost 5 hours on a charge while multitasking, watching videos, etc...and without wifi and dimmed down I got nearly 8 hours. A few weeks ago I installed VMWare Fusion 4 and W7 on it, and it just seems that ever since I did that, the battery life has been severely cut. I'm interested if anyone else has this issue. I can't imagine it being VMWare, but I don't know. So I'm asking! ALSO!!! This battery life decrease is NOT when I'm using the VM. It's OFF. Does anyone know what could cause a sudden decrease in battery life, if not this? Thanks in advance!