This is my first Theme Chooser mod. All it changes is the battery Icon in the status bar to a speedometer type icon with battery levels displayed in 1% increments. All you need to do is download the apk, install like an app, select the SpeedoBatteryMod from Theme Chooser and reboot. It has been tested on the Eris and also used on the Hero and Wildfire. Should work with mdpi and hdpi devices. If you get the error shown in the second screenshot just hit apply anyway. Hope everyone enjoys it as much as it's been enjoyed on the Eris!
Updated 4/12/2011 - Should not have any problems now with any Theme Chooser version or device
When using this theme you need to disable display battery percentages in CM settings for the battery icon to work properly.