[Kurt in NJ]

Those green knob devices are good at disconnecting the battery when you want it connected, the plastic melts ---when it works you just loosen the knob, they are not designed for the amperage of a 6V system, and have trouble with a 12V system, i have fixed many cranking and charging problems by removing it, they are good for buisness, ---tow truck buisness, battery sales, light bulb sales ---even a good insurance fire repair job once