What Is a Battery Eliminator Circuit (BEC)?
Gas and glow planes have a battery on board to power the receiver and servos. The “Flight Battery” has to be charged after a few flights to make sure power is available. That is why your transmitter charger may have another lead that is used to charge the flight battery. In electric flight a “Battery Eliminator Circuit” has been installed in most ESC’s to power the receiver and servos from the flight battery. 5 Volts is usually used on the red wire of the JR connector from the ESC to the receiver. If your flight batteries are over 10 volts you need to learn more about the BEC you are using. Most do not work above 10 volts.
