Lipo- TX/RX

[Papa]

The Z-1 will monitor the voltage of the TX battery. I am more concerned with the RX. I amlooking for a recomendation for a voltage regulator, cut voltage back to 6V , save the servo's. My other concern is with cell balancing. Both low voltage indicator I have seen offer visible, little light , warnings. What kind of "ratings should I be looking for on cells? Any body else done this done this. What issues should I be contemplating?