A simple battery status inidcator written in LUA using GTK to use with window managers that don't provide one, such as Awesome.
To install the dependencies:
For DPKG based distros: sudo apt-get install lua5.1 luarocks libgirepository1.0-dev acpi.
For RPM based distros: sudo yum install lua5.1 luarocks gobject-introspection-devel acpi
Than use the rockspec to install the rock.
Add show_battery_status to your initialization script, or simply run it in console.
Mouseover to see some stats.
Additional information can be found here: http://www.everythingisvoid.com/linux/simple-battery-status-indicator-awesome-window-manager