Same question here...
Hitec 7954sh for a Caster EX-1 powered by 2x 2S batteries.
I was thinking about wiring the servo power directly to a batteries and the signal cable in the RX but it would probably unbalance one of my batteries.
Options left:
- An external BEC
- A dedicated 2s battery just for the servo (I don't like this option)
Crazy ideas (not sure if possible...)
Is it possible to connect my batteries in parallel using the balancing cables while they're serially connect by the main cables to the esc? (i guess not...)