Version: V1 and V2
Yes, the battery on the transmitter is being used when flying. With the JR systems, the battery can be charged simultaneously. For systems like the JR XP9302, the RF module can be removed to conserve power.
With Hitec and Futaba, the transmitters must be turned on when plugged into the FS One USB Interface.
For the Hitec Aurora 9, click here.