Duracell Coppertop 9V Batteries provide dependable, trusted power to your household devices. 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. With a guarantee of 5 years in storage, you can rest assured that they'll be ready when you need them. Crafted and infused with triple corrosion protection, safely use for smoke detectors and carbon monoxide detectors, walkie-talkies, clocks, and other items you use on a daily basis.