Yes, if using an ESC you plug it into the throttle channel , nothing goes to the BAT slot. You use the BAT slot if you do not have an ESC as most ESC's have a built in BEC (battery eliminator circuit) built into it and supplies the 5 volts to the receiver through the Throttle slot. If you try to plug your LiPo battery (if it is more than one cell) into the battery slot you will most likely burn out the receiver and also any servos that may be plugged into the receiver at that time. Again READ YOUR MANUAL that came with the system.