I am taking a long trip soon and would like to use my home video game systems in my car. I bought a small AC inverter to power them, the package estimated power draw for various items and listed home video games at ~16 watts. But Looking at the transformer for my game cube it says 48 watts and the Playstation II says 70 watts. Is the Power draw that high or is that just peak or something? Does anyone know the real power draw for these systems?