I'm very happy with this purchase. My original Nikon D5100 battery is currently packed up in a box in the garage, and I really didn't want to spend full price on a new charger when I already have one somewhere! I saw that someone else had used this charger for the same camera and had a good experience with it so I decided to go ahead.It arrived within three business days, earlier than expected, which was great (I was a little disappointed it wasn't a Prime product, but three days was fine). The charger is a wall charger with a US plug on it and comes with what appears to be a European adaptor plug, as well as a car charger. My camera battery fitted in it perfectly (just slide it in and remember to slide it out and not pull on it, I nearly made that mistake).It charged within the same amount of time as any charger (a couple of hours), and my battery is holding the same amount of charge as it always has. I checked to see if it got too hot while charging, and no issues there at all.All in all, this is a very cheaply priced but good quality charger. I will update this review in a few months if I see any changes to the performance.