I have been frustrated beyond belief from the low battery life on my new 11" i5 MBA. It was, at most, getting 3 hours of battery life even with the backlit keyboard and bluetooth off, and the display on the lowest setting. I have click2flash installed as well as adblock+. The only thing I was doing that was processor intensive was running both firefox and safari at the same time. My page outs are already at 7.92 GB!! so I decided that I would try out running opera instead of safari----and what a difference that made! I got over ONE HOUR longer just from switching browsers! Why is it that Safari, the native browser produced by Apple is such a memory hog? You would think that it would be optimised from OSX... Well anyways, I hope this helps out some of you looking for better battery lives!