The Phottix Premium Series BG-D600 Vertical Grip/Battery Holder for the Nikon D600 is a perfect solution for doubling the battery life for lengthy shooting sessions. This grip can hold one EN-EL15 battery or 6 AA batteries. It offers a vertical-grip shutter button, dual control dials, multi-function controller and a AE-L/AF-L button to make shooting with the camera in a vertical position just as comfortable as shooting horizontally.