Well until now you either had to have some sort of human conduction to the stylus or ground it to an ac-outlet.
But using the principle of life, I figured out you can use a banana. Even when I fully isolate it from myself using a towel it still works!
Just roll up a piece of aluminum foil, make sure it has a nice surface to contact the phone, and your golden! (or yellow)

All just to swipe my screen so I can train H2H... sheesh lot of work

http://m.youtube.com/#/watch?v=c_PnjGAR ... _PnjGARuNU
bottom left corner would be powered by a lego technic motor and bananna stylus (you only need a piece of the banana) would be connected to the upper right corner
