Power Management in xmonad

Okay, this is also simple as well:

1. Install xfce4-power-manager:

   sudo apt-get install xfce4-power-manager
   

2. Start it on login, in the ~/.xsessionrc file. Once again, this should be after the shebang but before the if statements:

   xfce4-power-manager &
   

The power manager icon should now show up in stalonetray.