...is running? I have a 400 watt, a 600 watt and another adaptor that is smaller but I am not sure what the watt is on it. (it is a coleman adaptor that fits inside a cup holder and looks like a thermos. Also it only has one plug that can go in it.) All I need to do is run the xbox 360 or ps3 in the car while we are driving and i have tried my 600 watt adaptor but it never works. Maybe it is too much? I do not have any understanding of this Help please!! 