I just got a new core i5 MBA, and the battery life is not impressive . . . at all. I get about 3 hours out of it when I'm just browsing the internet. Screen brightness is down to a reasonable level too. I had the previous gen MBA and the battery life was better. Why would it be worse on this new machine, with a fresh OS install? Also, this new machine won't auto-connect to my Airport network when I wake it from sleep. I usually have to wait about 2 minutes before I can select my (5ghz) network. Could it be hardware issues?