Just how to get the "Your battery is damaged" message to vanish?
Maybe these guidelines will certainly aid you to remove that message.
Included guidelines from the link, Alt+F2, after that key in
/apps/gnome-power-manager/notify/low_capacity and also untick the value.
Or a solitary command :
gconftool --set /apps/gnome-power-manager/notify/low_capacity --type boolean false