TheNP-F550 Dummy Battery Adapter with D-TAP connector is designed for compatible camcorders and studio or camera lights that are compatible with Sony NP-F (L-mount) batteries. With this dummy battery adapter, you can connect a V-mount battery with a D-Tap output to compatible equipment that uses an NP-F (L-series) battery, so you can power the equipment for longer periods of time. Simply connect the D-Tap connector to the D-Tap output of the V-mount battery or D-Tap charger and install the NP-F550 adapter in your camera.