The SmallRig 1860 25mm Rod Clamp for Gimbal Stabilizers lets you mount additional accessories on DJI Ronin M and Ronin MX stabilizers, in addition to any other items with 25mm or 1.0-inch rods. Specifically, you can use it to mount your V-Mount battery on top of your Ronin to power all of your accessories to minimize camera weight on the gimbal.
It has an array of 1/4-inch and 3/8-inch screw holes that let you install items like EVF mounts, ballheads, and cold shoe mounts.