I don't have direct experience, but from the application I would think a latching relay would be desired. They use momentary pulses to open and close. My first google for such got several hits (I don't have time now to research) http://www.pdxrv.com/catalog/i915.html Joe -----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of Rob Dumoulin Sent: Friday, July 15, 2016 8:55 AM To: Pantera Mail List Subject: [DeTomaso] Relay Activated Battery Cut-off switch I have a quick disconnect on the side pole mounts of the Optima battery. It looks clean and functions perfectly but you have to open the front hood to operate it. Brad Freeman's car has a manual cut-off switch installed that is mounted through the trunk on the side of the battery that you can operate by reaching behind the glovebox from the passenger seat and turning it on or off. Has anybody added a massively heavy duty relay that can be triggered by a switch in the cabin to disconnect the battery? If it is a standard relay, it would only pull current when activated, so that would not drain the battery. Could it damage anything if the battery were accidentally isolated while the car is running (i.e. MSD ignition or fuel injection computer)? If anybody did this, what relay could you use?.