[From Derek Hatchard]
I downloaded this cool utility from CodePlex after Derek blogged about it and yes, it's a must have!
This tinny program will save up to 70% of your battery by disabling those nice, but greedy Vista features. Running in task bar with private workset of 5.5M and 0% CPU it will do all work for you, by enabling and disabling customizable features when power source changed or battery power fall under certain percent.
http://www.codeplex.com/vistabattery/Release/ProjectReleases.aspx?ReleaseId=6063