Xfce4-battery-plugin is a battery monitor panel plugin for Xfce4, compatible with APM and ACPI, for Linux and BSDs.
Xfce4-battery-plugin documentation
See NEWS for details on changes and fixes made in the current release.
Xfce4-battery-plugin source code
Xfce4-battery-plugin archive or Xfce4-battery-plugin tags
From source code repository:
% cd xfce4-battery-plugin
% ./autogen.sh
% make
% make install
From release tarball:
% tar xf xfce4-battery-plugin-<version>.tar.bz2
% cd xfce4-battery-plugin-<version>
% ./configure
% make
% make install
Visit the reporting bugs page to view currently open bug reports and instructions on reporting new bugs or submitting bugfixes.