Spektrum Aircraft Telemetry Flight Pack Voltage Sensor V2 2Pin SPMA9570A
Spektrum Aircraft Telemetry Flight Pack Voltage Sensor-2pin SPMA9570A is compatible with all newer receivers that use a 2 pin Voltage socket and this is the lead that ships with some of the telementry receivers.
This cable ships with the AR637T receiver and others, it plugs directly into the Voltage telemetry port, and you solder the ends to your ESC on the battery side. I'm told by Spektrum reps on RC Groups that it supports up to 60V (14S) packs, and I can confirm that once soldered you can power on the model, run the Telemetry "Auto Config" on your radio, and VolRead more about review stating Ships with AR637T, works great
ts shows up as a new telemetry item reporting flight pack voltage, with the ability to select the number of cells and sensible default warnings for low voltage alerts