Note that stock GingerBread ROMs do not have the Battery History activity. You need CM7 or Custom Rom to see this. I am working on a fix for a future version.

For example:

Enable/Disable compatibility mode to allow Apps to work at full screen size on Galaxy Tab and other large screen devices

Control windows animation speeds or disable them entirely to speed up your device!

Control windows transition speeds or disable them entirely to speed up your device!

Control haptic feedback

View battery history and information

View usage statistics

Control WiFi sleep policy to keep WiFi connected

No annoying AdMob adverts

And much, much more!