The PB70-BMCC is a 70wh 14.8v lithium-ion battery pack. While an internal battery on the BMCC will only run for 90 minutes, the PB70-BMCC will nearly quadruple that runtime. The 12" cable provides more flexibility with mounting the Powerbase battery pack.
The Powerbase-70 mounts under the camera doubling as a grip or may attach to a Camera support via its 1/4-20 release plate or V-mount.
Wired as a 14.8v battery pack it can provide extended power to up to two additional 12vdc devices, as well as