The tinyESC V2 6.5V to 36V, 1A ESC w/ MiniQDs includes a Battery Eliminator Circuit. If there is no 5V supply present on the robot, this will power the radio receiver from the main battery. There is a blocking diode, so multiple tinyESC BECs can be run at once, along with one non-tinyESC BEC (like in a weapon motor controller).
You can control the tinyESC from a powered device (like Arduino, etc.). It includes 0.01uF capacitor.