Pro Series CBG6D Battery Power Grip For Canon EOS 6D DSLR Cameras (BG-E13) - Black
This Canon Battery Grip for the EOS 6D DSLR cameras by Gutsy holds up to (2) LP-E6 battery packs simultaneously to effectively double your shooting power, plus the grip includes a holder to use (6) AA batteries. In addition, the grip includes a vertical shutter release and a mode wheel to provide access to all of the camera functions and make shooting with the camera in a vertical position just as comfortable as shooting horizontally.