If your not driving it a simple solution would be to remove the positive battery cable before quitting for the day and don’t reconnect it unless working on the ign/electrical system.
Agree with Martin.
I disconnect the neg every time I get out of my truck. Just can't sleep at night with battery hooked up. The cable clamp is just right to put it on and twist a little. There is no cure for paranoia, so this is the only answer. A light does not work on idiots, so I can't use that.
