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 other devices requiring lower voltage through an additional XP power regulation cable. The pack is also furnished with a 1/4-20 on either side to mount accessories.