Sean,
The switch indicated by Bob is different than the unit you are familliar with. This "newer" unit is designed for dual redundant batteries, both regualted and offering failsafe for both packs.
I have tested this unit throughly on the bench before listing it on Dreamworks, I am very confident in the quality and performance this unit offers. Yet another step forward in providing system redundancy and reliability to our aircraft.
Duralite now offers their single pack, failsafe switched regulators with a Futaba style heavy duty switch as well....
Todd