[lowerdfool]

Here's the wire schematics for a charging station like what I've made. I haven't yet tested the voltage when 4 cars are on but I can successfully charge 2 at the same time without any drop in voltage as long as the batteries are new. I will probably in the near future get an ac/dc adaptor to plug into a wall that way I don't have to continue to change batteries as long as I'm at home or somewhere with an outlet.

and for the pic....