TheWooden CameraBattery Slide Pro V-Mount for Sony FX9attaches to the rear of the camera and supports a V-mount battery while leaving access to the camera’s standard battery compartment. With the camera’s BP-U35 battery in place, hot swapping is supported.

The Battery Slide Pro also features three D-Tap ports for powering accessories. Additionally, it uses a digital fuse that monitors the D-Tap ports and disables them if they exceed the set current for accessories while leaving the camera running. Once the load has been reduced by removing accessories or otherwise, a reset button can be pressed to enable accessory power again.The Battery Slide Pro attaches to the back of the camera via a top plate, using screws that come installed in the plate. (It attaches where the optional Sony XDCA-FX9 Extension Unit would normally attach.) It connects to the camera using an integrated barrel connector cable.