I have been having a problem with my batteries going dead when parked for more than one day for the past few months.

I checked it, and with the MM3 plugged in, my batteries draw over 138 MA.

When I unplug the MM3 from the OBD2 port it drops to s 16 MA draw. Has anyone else experienced this and if so what was the fix other than just unplugging it when it sits overnight or the weekend?