xfce4-battery-plugin - 1.1.2-1 main

A battery monitor panel plugin for Xfce4, compatible with APM and ACPI, using
either /proc files or the new sysfs files for recent kernels. You can use this
applet to monitor your battery level and be notified when your battery reaches
low and critcal levels. The applet can even be programmed to execute a command
on low and critcal levels.