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.
Changes
All timers completely removed
New power management API used
Completely removed managed power management wrappers
Features added
Power plans management
Bug fixes
Wake from sleep
Battery level disablement
Notification messages
Running application with sidebar
Rerun sidebar after it was disabled by policy
More information in this blog post