These are good batteries, but are not true lithium. Unfortunely, "Lithium" has become the new buzz-word. And there are several types of lithium batteries, all of which have 3.x volt cells, and tend to blow up if abused. They are currently being used in many controlled applications, unfortunely due to the ignorance and carelessness of the general US customer, they cannot be released openly. I have been using them in various high and low drain applications for many years, and have no problems with availability.