Provides warning notifications at user-configurable thresholds.
This widget will not drain your battery. It is implemented as a listener, and does not poll the system for battery status, so it uses almost no cpu time. Instead, the system notifies the widget when there is a change to the battery status. If you want to see which applications are using battery power, go to your phone Settings | Battery Manager | Usage Statistics for a list.
Please note - this is a widget, not an application. Long press on home screen to install.