Pro series Multi-Power Battery Grip for Nikon D7100 SLR Digital Camera w/HeroFiber Ultra Gentle Cleaning Cloth Doubles the Battery Capacity Effectively Doubling Your Shooting Time Significantly Improves Stability Especially in Vertical Position Battery Compartment Holds One EN-EL15 Lithium ion Batteries, AA Cartridge Plate Holds 6 AA Batteries for Added Convenience Great Quality, Ergonomics, Functionality, and Construction