Procell Alkaline 9VProcell Alkaline 9V industrial batteries are general purpose batteries, ideal for powering mid and low drain professional devices, such as smoke/carbon monoxide detectors. Each battery comes with a quality warranty. Design, safety, manufacturing, and qualification follow Procells stringent battery standards, which incorporate parts of the ANSI and IEC battery standards. Economically packaged in bulk. Used by manufacturers around the world: Procell Alkaline batteries have been designed in collaboration with manufacturers to work best in professional devices Operating temperatures from -4F to 129.2F. 12 per pack