Power your Sony a7 III with a high-capacity V-mount battery using this Ultra Mini V-Mount Adapter Plate with 15mm Rod Mount from IndiPRO Tools. The plate connects to the camera using a dedicated NP-FZ100 type dummy battery at the end of a coiled cable that extends from 18 to 40" in length. Made from ABS plastic with an aluminum alloy mounting slot, the plate is lightweight and durable, able to stand up to the rigors of production. A robust 15mm rod clamp allows you to mount the plate on 15mm support rods for powering your camera or accessories. Featuring two D-Tap outputs, you can power two devices simultaneously from your V-mount battery.