(Battery Eliminating Circuitry): BEC is the abbreviation for Battery Eliminator Circuit, which is a built-in voltage regulator that supplies a constant voltage (usually 5 or 6 volts) to the receiver and servo The receiver does not need an external battery pack, but one can be used if desired
A common feature among electronic motor speed controls, it uses the battery supplying motor power to power the onboard radio gear, eliminating the need for a separate receiver battery The circuitry provides regulated power to the receiver and usually includes auto cut-off
(Battery Eliminating Circuitry): Eliminates the need for a separate battery pack to power the receiver and servos This circuitry can be found in speed controls as well as receivers