Duracell Coppertop All-Purpose alkaline batteries are not only dependable, they're also long-lasting. You can take comfort in a 5-year guarantee (in storage with Duralock Power Preserve Technology. 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.