This Core SWX Coiled D-Tap Cable allows you to connect a D-tap power source to the Panasonic GH4 camera. It features a D-tap connector on one end and a dummy battery that installs into the camera on the other. It can also be used with any other device that uses Panasonic DMW-BLF19 7.2V batteries.
The cable runs 18" when contracted and 48" fully extended.