warning if battery is low

hi I use opensuse 13.1 in my laptop but when the battery is low, the my laptop turns off…
can I obtain a warn when the battery is low before that it turns off?
thanks

Hi
Which desktop environment?

If gnome-shell you can set via the dconf-editor org->gnome->settings-deamon->plugins->power or via gsettings (same schema) from the command line.