Battery Switch for Negative Terminal: Applicable to the battery negative diameter of 15-17mm, 12V/24V. Widely used for car, vehicle, RV, ATV and boat batteries, also used for electrical equipment. Vertical knife blade type. Car Battery Master Disconnect Switch: To prevent the battery from being consumed by the car, to facilitate temporary power off during vehicle maintenance. Extend the service life of the car battery. Material: Car battery power switch made of brass with electroplated surface, corrosion resistance. corrosion, good conductivity. Maximum current up to 800A, rated current 150A. Just lift the knife and then the power is cut off. The battery switch prevents short circuits and fires when working on electrical systems. Easy to install: can be adjusted by the bottom of the screw, into a vertical knife switch or a horizontal knife switch.