l CopperTop all-purpose alkaline batteries are not only dependable, they?re also long-lasting. You can take comfort in a 10-year guarantee (5-year guarantee for 9V) in storage. They?re great for many of the devices you use on a daily basis. And from storm season to medical needs to the holidays, Duracell is the No.1 trusted battery brand so you know it?s a battery you can trust. Duracell AA Batteries: The Duracell CopperTop Double A alkaline battery is designed for use in household items like remotes, toys, and more. | Duracell guarantees these batteries against defects in material and workmanship. Should any device be damaged due to a battery defect, we will repair or replace it at our option. | Long Lasting Power: Duracell alkaline batteries are designed and developed for long lasting performance. | Guaranteed for 10 years in Storage: Duracell AA alkaline batteries are guaranteed for 10 years in storage. | Duracell CopperTop batteries are available in Double A (AA), Triple A (AAA), C, D and 9V sizes.