Wasabi Power Battery for Nikon EN-EL18 and Nikon D4, D4S, D5 Rechargeable lithium-ion battery for Nikon EN-EL18 Rated at 10.8V and 2800mAh for longer battery life Premium Japanese cells for longer battery life with no memory effect Fully compatible with the Nikon camera and Nikon MH-26 charger Includes battery with 3-year manufacturer warranty