The PriorityStart ProMax 12-Volt Vehicle Automatic Battery Protector is a portable and automatic device designed to keep small draw to kill a battery. It disconnects battery until a draw is sensed and it enables the vehicle to start . It provides seamless quick and automatic battery protector feature ensures that the jump starter only provides power when needed, preventing potential damage to your vehicle's battery. This product is a reliable and convenient solution for anyone in need of a quick and easy way to avoid jump starts .