Battery status on panel?

[Zoidiano0]

i have installed the xfce powe manager plugins
it recognize when i plug or unplug the cable and shows charging and discharging notifications even but never shows up the actual value of the battery so every time i unplug it it says battery too low, how to pointer the configuration files of the plugin to work with the pine battery values on the /sys/class/power/battery ( or something like that ) directory ??