I haven't determined how I'll proceed, but if this works as advertised by PB, I think it would definitely be my preferred approach. As has been quite obvious from all of the responses today, there are many ways to accomplish this. Even Electron stated they've seen many users share either the RX or ECU battery w/out issues. They don't recommend either as it could lead to a liability. Anyway, thank you for your suggestion, noted.

sc