This battery grip attaches to the base of the Pocket Cinema Camera 6K or 4K, running on two Sony L-series type batteries for over two hours of extra runtime on a single charge (depending on the installed batteries and operating conditions), or to power an external flash drive. Batteries charge in place via the camera's DC connection, and the carbon fibre grip adds a non-slip handhold plus a slide-out tray and a storage slot for the camera's battery door cover.