The Anton Bauer Gold Mount Plate for Blackmagic Cinema Camera is designed specifically for the Blackmagic camera's power input, compatibly featuring a 2.5mm unregulated DC connector, right-angle shaped, on a 2 ft integrated cable. For powering accessories simultaneously with the camera, the plate has two P-Tap outputs. The plate attaches onto a rig by means of an optional cheese plate, such as Anton Bauer's MATRIX cheese plate (which mounts both 15 and 19mm rods).
Compatible batteries include Anton Bauer's DIONIC HC. The HC outputs 14.4V of power and has a 91Wh capacity that could pull off powering the camera for about four hours, unless you're shooting 2.5K raw, which requires more power than normally.