TowMate RVHW32 RV Wireless Tow Light Important. Please note: This light is a little different from most other Towmate wireless tow lights in that the light does not use a battery. It receives power from a 6' cord that plugs into the cigarette lighter of the vehicle you are towing behind the RV. It does not need a battery. Typically, this light would be mounted on top of the vehicle you are towing or placed in the back window.