Ken,
Small point...Are you aware that when you switch off the battery your not actually switching off the battery. The battery switch has no direct link to the battery at all. It just changes the logic of battery power should there be reconfiguring needed later....like no external power. You can press the switch off in flight with no effect if you really want. Ground test enable switch is for engineers only !! and don't get me started on the idiots who play around with the MFD curser sensitivity settings on the EFB.