The Vivitar Deluxe Power Grip for Nikon D90 will power a Nikon D90 camera on 2 EN-EL3e rechargeable li-ion batteries, or 6 AA Ni-MH or alkaline batteries (using the adapter plate). The grip includes an alternate shutter release button, an AE-L/AF-L (auto-exposure and auto-focus lock functions) button, and Main and Sub-Command dials for shooting in "tall" (vertical) orientation. The grip also helps maintain stability when holding the camera and provides extended shooting time.
Adapter plate holds 6 AA Ni-MH or alkaline batteries
Provides extended shooting time
Includes an alternate shutter release button, an AE-L/AF-L button, and main and sub-command dials for taking pictures in "tall" (portrait) orientation
Improves stability