The Duracell Copper Top C Coppertop 10 YEAR Alkaline Batteries are reliable and long-lasting power sources for your devices. These 1.5-volt batteries come in a convenient 2-pack size and are designed for regular use. With an expiration date of 2035 and a manufacturer warranty of 10 years, you can trust that these batteries will provide consistent power for your electronics. Made with quality and performance in mind, these Duracell batteries are a practical choice for all your everyday needs.