If you’re like me, you are constantly looking for ways to improve the battery life of your Tablet PC. Even 4-6 hours just isn’t enough sometimes. In steps a small application called Vista Battery Saver. This lightweight, free application will automatically tweak your Vista system profile when you unplug to a more battery efficient profile (and less processor intensive, too). You can customize exactly what happens, but key components are turning off Aero and Sidebar only when on battery. It claims to save "up to 70%" of your battery usage which would truly be remarkable. I plan on trying this out over the weekend to see exactly how much it can help my battery usage.
via Chris Pirillo