Power up your watches, thermometers, hand-held games and more Reliable, long-Lasting power lets you operate devices with confidence Individually date-coded for efficient inventory management. Batteries have a 7-year shelf Life, remaining dependable for up to 7 years in storage. Batteries do not contain added mercury. Duracell (R) 1.5 Volt Silver Oxide Battery, D303/357B3P10 is one of many Watch, Calculator & Specialty Batteries available through Office Depot. Made by Duracell.