I bought this for my Nikon P300, so I can keep a fully charged spare in the camera case . I chose a Duracell replacement battery on the recommendation of another P300 review, as I was concerned that some of the Nikon EN-EL12 batteries reviewed appeared to be copies. The good reviews didn't specify the supplier, so in the end I went for this one. It didn't come with a little plastic terminal cover though, but the one with the original battery fits, so I use that one. At the time of purchase there were two different Duracell batteries available, one with a one year warranty and one with a 3 year warranty which was a bit more expensive. In the end I chose the 3 year warranty. So far it is performing well - no complaints. If I subsequently find to the contrary - I'll update this review.