The Powerbase-70 is a 70wh 14.8v lithium-ion battery pack providing up to 6x the runtime of Canon OEM batteries. Specifically designed for the Canon 5D MkII and Canon 7D. The 24" 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 HDSLR 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.