Duracell PROCELL alkaline batteries are manufactured using superior cell design (vs. prior Industrial alkaline batteries) to ensure high-quality cell construction. Design, safety, manufacturing, and qualification follow Procells stringent battery standards, which incorporate parts of the ANSI and IEC battery standards. Economically packaged in bulk and individually date-coded for effective inventory management. Each battery comes with a quality warranty. Operating in temperatures from -20C to 54C. Used by manufacturers around the world: PROCELL Alkaline Batteries have been designed in collaboration with manufacturers to work best in professional devices.