Page 4 of the Powerbox sensor instructions

http://www.powerbox-systems.com/shar...englisch_f.pdf

says they make a 5.5V version with Mpx connectors. So it seems likely that PB make the Mpx one.

Page 8 gives a reason why a cheap copy might not be as reliable.

Page 12 has a block diagram of the circuit indicating what’s inside the PB switch. Does the HK version have anything similar in their instructions which might show that it works in exactly the same way?

I’ve had a couple of the PB versions in my two (admittedly small) jets working for a couple of years now and like the fact that I don’t have to be suspicious of their quality.

FWIW I’ve had a dozen of HK’s 30C and 40C Turnigy and Zippy lipos, and the poor results and failures I had with them are the entire reason I gave up on high power (3.5-4kW) electrics and turned to Wren 44 Gold turbine and Saito FG-36 petrol power instead as being ultimately more cost-effective and more reliable.