Vello BG-N11 Battery Grip for Nikon D7100 & D7200 | Vello
Amazon.com: Nikon D7200 Battery
Amazon.com: Green Extreme Multi Power Battery Grip (MB-D15 Replacement) for Nikon D7100 & D7200 DSLR Camera, Holds EN-EL15 Battery or 8 AA Batteries : Electronics