Duracell Coppertop All Purpose alkaline batteries are not only dependable, they are long lasting. 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. Should any device be damaged due to a battery defect, we will repair or replace it at our option.