Which browser isn't such a battery hog?
The three computers in the test were a Gateway with an Intel processor, a Gateway with an AMD processor, and a netbook, the Asus Eee PC. The two Gateways were running Vista, with the Eee PC running XP. On the Eee PC, the browsers all came in within a few minutes of one another, meaning you should make your decision based on other features. On the other machines, though, IE was the clear leader. Firefox (with adblock installed) came in second. Because adblock keeps battery-intensive Flash elements from being displayed, running it will let you eke out an extra 10 minutes compared to standard-issue Firefox.