I purchased one for my son. He liked it so much that I ended up getting three for myself. I have two for my digital camera batteries and one for my digital recorder batteries. If you use NiMH batteries then do yourself a favor and charge them at the low setting as they recommend. I've been using the same four sets of batteries for over 2 years now. I have older batteries which I wasn't as careful with and as they begin fail I notice a diminished cell voltage when you begin to charge them after they've been in the same camera together. I save those batteries off to the side and I use them in flash lites and other things.By the way the batteries that come with them seem to have a larger diameter than most batteries. I notice that they are a tight fit in my digital camera. I think that perhaps they are manufacturing rejects.