Originally Posted by rhodopsine

One way to have it, if your receiver and servo supports the battery voltage is to solder a servo cable's red and black wires to the positive and negative of your battery connector. then, disconnect the red wire (+) from your ESC wire. This way, your receiver will run out of the battery and what you'll have is the main battery voltage and not the BEC voltage. Of course, like I said, your receiver and servo must support the battery voltage so anything outside of 1s or 2s is bound not to work and may fry your receiver and servo.

Martin Paradis