Must Have Battery Disconnect Switch: Battery disconnect switch protects everything from cars to boats to semis with this knob, handling 12V of up to 125A continuous & 500A momentary current. It is ideal for cars, boats, trucks, RVs vehicle and electrical equipment batteries. Handles 12V up to 125A continuous & 500A momentary current. This switch fits the slightly smaller negative terminal of all standard size automotive batteries. Ideal for cars, boats, trucks, RVs and more. This extremely convenient disconnect switch allows you to quickly and easily disconnect your car battery for safety, maintenance or storage. Easy to install and simple to use. To turn on the power, simply tighten the green button and slightly loosen the green button to disconnect all power. The battery disconnect switch weighs 120 g. Note: The data are all measured manually, please allow 1-3 cm error, due to differences in light and display, there may be some color differences, please refer to the actual item received.