There really isn't much to be said about this item. It charges, it lasts as long as the original manufacturers battery, if not longer and it is a great price. If running a power hungry device such as the Pentax K-5, extra batteries are a must have. I have five of these type of batteries now and they all work the way you want them to. If I needed more batteries for my camera, then I wouldn't hesitate to buy more of these batteries.