This guy is tapping the 12V that gets disabled unless Sentry Mode is on?... Why? I'm not sure the concern over killing the 12V battery is valid considering you only use significant power when the liftgate is actually running. Dashcams draw watts of power while off, hence why they're killing batteries. I haven't measured it, but I don't think the control box is going to be pulling the same amount off the 12V.