Opteka BP-D80 Battery Grip for Nikon D80 & D90 Digital SLR Holds 4 AA Batteries or 2 EL-EL3 batteries Vertical shutter release also makes shooting with the camera in a vertical position just as comfortable as shooting horizontally, Buttons for AE lock, AF point selector, aperture value, shutter, and mail dial About 5000 shots when using 2 EL-EL3 batteries Increases functionality and convenience, 1 Year warranty