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Does anybody know about the full functionality of the 6 pins on the back of the TX500. ?I realise that 2/3 pins on each pad are the +supply and ground, does anybody know about the other single pins in each pad?

From looking at the information in the BP500 manual the radio displays three items of information, DC in, Battery charge level and Charge power.?

Clearly Battery charge level can be determined by the voltage being supplied on the 4 (2+2) power pins. The other two single pins i assume are either analogue (ADC inputs to the TX), my best guess or some digital com pins, less likely i feel. Before i start testing with probing high impedance voltages up the two pins to see that the TX displays i wanted to check if anybody else has looked at this side of the circuit, or traced any tracks on the reverse of the main pcb
?

Just wondering if you ever figured this out. I want to DIY a 4S pack, maybe a 4S 2P pack, and use the pins to supply power instead of having to wire to the input port on the radio. I can't find anything about how to setup.