Guys...
My understanding of the basic electrical system of the NG, with regard to the battery switch is as follows:
With the Battery switch OFF - the switched battery bus is not powered, except in the case of the standby power switch in BAT. But the hot battery bus continues to be powered unless the battery is disconnected!
With the Battery switch ON - all battery busses are powered.
Battery switch ON - can operate APU starter and electric stairs.
Battery switch OFF - those things won't be powered, but other things like the two airplane clocks will continue to be powered (although with no display).
Short, but I think you will get my drift...
Cheers...FD...
