Battery Eliminator Circuitry. This feature enables a speed controller to operate a receiver from the same battery that the motor uses. BEC saves weight, as it eliminates the receiver battery.
Battery Eliminator Circuitry. Allows receiver to draw power from a main battery pack, eliminating the need for (and weight of) a receiver battery.
Battery Elimination Circuit. A circuit, usually contained within the speed controller or ESC, which allows the radio control receiver to be run from the motor battery. This saves carrying the extra weight of a separate receiver battery. The 5 volts needed for the receiver is supplied by reducing the input voltage. Because of this most ESCs only support BEC up to a certain number of cells (and therefore a certain voltage input) and for a specified number of servos. Over these the heat produced by the voltage reduction may fry the controller.