The F&V Lighting V-Mount Battery Plate features a d-tap outlet for powering accessories including lights and monitors. allows you to change a 3-stud Battery Plate to that of a V-Mount Battery Plate on your F&V X-Series Lights or 3-Stud Battery System. Unscrew the four (4) screws located on the top of the current battery plate, allowing access to change your battery plate to a V-Mount Battery Plate. The 3-Stud Battery Plate is not self-enclosed. It must be used in conjunction with an X-Series light panel.