Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Battery and must have for Nikon D80

Battery is genuine Nikon Battery. BUT be careful of which seller you are dealing with. I bought from Cameta Camera, 17th St Photo and J&R Music and Computer World. They are all reputable and sell the genuine article. You must use the genuine Nikon Battery with a D80 or you will void your warranty if it explodes or anything bad happens.