Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Loses power quickly and can become stuck in camera

I originally thought this was a good buy. It did not hold power as long as the original Nikon battery, but it is much cheaper. However, I soon found that it began to lose power *very* quickly. Even more important, it started to stick in the camera and was very difficult to extract. This happened with two different Nikon cameras (P80 and P100).