The V-Mount Battery Adapter Plate from IndiPRO Tools offers a lightweight battery solution with multiple outputs to simultaneously power your Sony PXW-FX9 cinema camera as well as a variety of accessories mounted on your camera rig.
The durable plate features two unregulated 14.8 VDC D-Tap outputs and a 19.5 VDC barrel output on the end of a 5" cable to power the camera. It mounts onto the back of the camera using its integrated aluminum top plate and the included captive screw set.