I decided to make a AA puck yesterday and my mom liked it so much that I went back to radio shack and got the parts to make another for her. I still have yet to get the NiMH rechargeable batteries, and even with the crappy low discharge alkalines it hits harder than my tornado. I think that's getting tired though. Its nice to know that I can walk into just about any store and get something that will work in a pinch. I can't wait to use some real batteries in it.