Procell Alkaline Constant Power 9V industrial batteries are ideal for powering low drain professional devices which require constant current over a long period of time such as smoke/carbon monoxide detectors. Delivers Longer lasting power (vs. prior Procell Alkaline 9V batteries) in Low drain professional devices, that may result in fewer battery replacements and may therefore lead to savings on operating costs that are associated with battery replacement. Guaranteed 5 years in Storage. Manufactured using superior cell design (vs. prior Procell Alkaline 9V batteries) to ensure high-quality cell construction. Each battery comes with a ‘quality warranty’. Design, safety, manufacturing, and qualification follow Procell’s 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. Used by manufacturers around the world: Procell Alkaline batteries have been designed in collaboration with manufacturers to work best in professional devices.