Give yourself peace of mind with the Koolatron 12 volt battery saver. When plugged into your vehicle's 12 volt outlet, the battery saver senses when your vehicle voltage drops below 11 volts. It then shuts off the current to all accessories plugged in, preventing further drainage. It will reconnect automatically when you start your vehicle. This battery saver gives you peace of mind by ensuring yo
u will always be able to start your vehicle.