Vello BG-N2 Battery Grip for Nikon D80/90 [Camera] Works with the Nikon D80 and D90 Digital Cameras Accepts up to 2 EN-EL3e batteries to effectively double the camera's battery life The included AA battery holder allows you to use 6 AA batteries for added convenience An alternate shutter release button, main and sub command dials, and an AE-L/AF-L button are provided to facilitate shooting in a vertical orientation