This CTA Digital battery replaces the Nikon EN-EL4 digital camera battery. This battery was designed to meet or exceed OEM specifications and is 100-percent compatible to the original equipment chargers. Make Overstock.com your choice for all your audio and video needs. Battery Specifications: Chemistry: Lithium Ion Voltage: 11.1V mAh (Capacity): 2200mAh Memory Effect: No Warranty:3 Years For use with the following Nikon digital cameras: D2h Pro And all similar models.