Battery Cut off Disconnect Kill Switch W/ Removable Key Power Cutoff Anti Theft This Battery Cut off Switch Is A Single Circuit Disconnect Switch With Detachable Key. It Isolates The Battery Circuit For Anti-theft; Anti-fire; Short Circuit Protection; And Unwanted Battery Drain And Is Ideal For RV; Marine And Farm Equipment. This Battery Cut off Switch Is Not For Use With Vehicles With Full Time Power On Demand Computers Or Vehicles With Thermostatic Controlled Cooling Fans. Rated 100 Amps Continuous; 1000 Amps Surge; At