Duracell Coppertop all-purpose alkaline batteries are not only dependable, they're also long-lasting. 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 its a battery you can trust. Coppertop batteries are available in AA, AAA, C, D and 9-Volt sizes.