With a guarantee of 10 years in storage, you can rest assured they will be ready when you need them during storm season or power outages. Duracell Coppertop batteries deliver reliable power to your everyday devices throughout the home, like toys, remote controls, flashlights, calculators, clocks and radios, wireless mice and keyboards, and more. Coppertop batteries are available in AA, AAA, C, D, and 9V sizes. 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. From storm season to medical needs to the holidays, Duracell is the #1 trusted battery brand.