I have owned the CR2 charger and 3 batteries for over a year and they do everything they are supposed to do. They come off the charger at 4.2 volts and they hold a charge for a very long time. I use them in flashlights and I have one in a light that has set on a shelf for better than a year and the battery still tests at 4 volts. I have tried other brands, but the Juice batteries are the best in a RCR2 that I have found to date.