Cozyehoo switch easily prevents unwanted battery drain. It provides isolation and protection for the electrical system, eliminating any power draw from the battery when the vehicle is not in use. Suitable only for the negative terminal, it conducts a maximum current of 750A and a rated current of 250A. Made of brass, it is corrosion-resistant, durable, and offers excellent conductivity. Fully safe to use. Widely applicable for batteries in cars, trucks, boats, RVs, and electronic equipment.