Hi Josh -

Your electronic speed controller (ESC) almost certainly contains a battery eliminator circuit (BEC). The BEC eliminates the need for a separate receiver battery by regulating the main battery voltage to a lower voltage that is safe for the receiver and servos.

The BEC sends voltage to the receiver through the 3-wire cable that plugs into the throttle channel of the receiver. There are occasions when the built-in BEC should not be used, such as when you have a large number of servos or the servos require a lot of current. However, for most applications, the built-in BEC is fine. The typical hookup is shown below.

Perhaps if you provide complete details on your plane and its equipment, we can provide more info.

- Jeff