your shooting time with the Vertax D12 Multi-Power Battery Pack Battery Grip, designed for Nikon D800, D800E, D810, and D810A. This battery grip is perfect for photographers who need longer shooting times without having to swap batteries frequently. The grip also comes with a convenient shutter release button and can hold one EN-EL15 battery. The Vertax D12 is specifically made for grips and is compatible with Nikon D800, D800E, D810, and D810A models. With its reliable power source, you can enjoy longer shooting times without worrying about battery drains. The grip also has a shutter release button for your convenience. This item is perfect for photographers who want to capture more photos and videos without worrying about running out of battery.