Well locksmith, I hope u re using vista. In Vista side bar there is no battery gadget by default. however u can download it from the link
http://gallery.live.com/search.aspx?q=battery
There are many battery gadgets. download any one of ur choice.
and here is the one for linux.
http://www.tuxisalive.com/developer-...monitor-gadget

and for wireless stuff. U can download wi-fi radar.
http://wifi-radar.systemimager.org/
And this stuff is available for windows as well as linux. Hope i solved ur prob.