B00BOPP596 Bower XBGND800 Digital Power Battery Grip for Nikon D800 and D800E (Black)

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Designed to extend up to six times original battery life
Vertical shutter release with autofocus for convenient, comfortable portrait shooting
Includes Infrapro remote for crisp, blur-free image capture
Can hold 8 AA batteries as alternate power source
Compatible with Nikon D800 and D800E digital SLR cameras