Procell Alkaline Constant D industrial batteries are ideal for powering low-drain professional devices which require constant current over long periods of time such as alarm panels, security keypads, automatic faucets, remote controls, flashlights, and more. Guaranteed 10 years in storage. Delivers longer lasting power (vs. prior Procell Alkaline D batteries) in low drain professional devices that may result in fewer battery replacements and can lead to savings on operating costs associated with battery replacement. Operating temperatures from -4°F to 129.2°F. You can use up to 30% fewer batteries by switching to Procell Constant for low-drain devices. Manufactured using superior cell design (vs. prior Procell Alkaline D batteries) to ensure high-quality cell construction. Economically packaged in bulk. Available in AA, AAA, 9V, C, and D sizes.