Opteka Battery Pack Grip/Vertical Shutter Release for Nikon D40x, D40, D60 and D5000 Digital SLR with 2 extended EN-EL9 Batteries (2400mAh Total) Dual shutter control for easy vertical shooting Innovative positions for shooting convenience, Tripod mountable Includes AA & Lithium Battery Trays, 1 Year warranty 2 extended EN-EL9 Ultra high power True 2000mAh, Lithium Ion 7.4v, Memory free batteries for maximum performance Extended shots - Up to 25% more then original, Brand new, 2 Year performance warranty