Automatically disconnects battery if voltage drops to 12.5V, ensures sufficient cranking for usual start. Allows use of 12V filter heater for Racor R90T filter element with no fear of dead battery.
Pushbutton on dash (Battery Brain IV) allows reset to turn battery on if it has been disconnected by the device. For greater flexibility and convenience, users may prefer the Battery Brain III with remote control key fob, turn battery on/off. Specify which version you would like when ordering.
Battery Brain III or IV 
Automatically disconnects battery if voltage drops to 12.5V, ensures sufficient cranking for usual start. Allows use of 12V filter heater for Racor R90T filter element with no fear of dead battery. 