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Review title: Don't bother
Product review: The Nikon original battery has a fourth contact to maintain the CMOS info. This battery does not. I was plagued by error messages saying the camera clock was reset until I figured out what was wrong. Using this battery, the D40 still worked and wrote to the card, though.The "real" Nikon battery handled 2 weeks of wildlife shooting in Africa with only one recharge, even with an autofocus and antishake telephoto. I'd get one of the Nikons instead of two of these.
