The Switronix Powerbase-70 Battery Pack for Blackmagic Cinema Camera is a 70Wh 14.8V lithium-ion battery pack. While an internal battery on the Blackmagic Camera will only run for 90 minutes, the PB70 will nearly quadruple that runtime.
It features a 12" DC cable extending from it for convenient connection to the camera and it mounts onto the camera by attaching to its underside, thus doubling as a grip. It can alternatively be attached to a support rig by a 1/4"-20 release plate or by V-mount. 1/4"-20 mounting points are also found on the sides for additional accessories to be attached.
Wired as a 14.8V battery pack, the BP70 can provide extended power to up to two additional 12 VDC devices and as well to lower-voltage devices through an additional XP power regulation cable.