Duracell 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 #1 trusted battery brand so you know it’s a battery you can trust. Battery Features Long Lasting Power: Duracell alkaline batteries are designed and developed for long lasting performance. Guaranteed for 5 years in Storage: Duracell 9V alkaline batteries are guaranteed for 5 years in storage. #1 Trusted Battery Brand: Duracell CopperTop are available in Double A (AA), Triple A (AAA), C, D and 9V sizes.