Well...FWIW the power supply looks like it's ~8.6 VDC, single-ended, with a regulator chip or two to get the voltage down to where some of the chips need it. On my circuit board, the regulator is a...

I'm looking to make my mesh extender battery-backed-up...although I can find pictures of the circuit board, I can't find a circuit diagram. Anybody know what it's power supply output voltage(s) might...