Shows your battery charge level (percent) as an icon in your status bar, with
temperature, health, voltage, and time since plugged / unplugged in the
notification area. It also has user-configurable alarms, logs, and widgets.

* Automatic time-remaining estimates based on recent usage
* Several icon sets (including fully configurable green, amber, red, and black icons)
* Small (1x1) and large (4x1) app widgets
* Notification (with status bar icon) is now optional -- can be used as just a desktop