Duracell Coppertop AAA alkaline batteries, built in the USA with US and global parts, contain Duracells exclusive POWER BOOST Ingredients, which deliver dependable, long-lasting power to your everyday devices throughout the home, like toys, baby devices, home and kitchen accessories, flashlights, medical devices, clocks, and more. From storm prep to holiday needs, Duracell is the number 1 trusted battery brand.