Make sure that your essential devices are always powered up with these Duracell Quantum AAA batteries. They're great for portable electronics, wireless mice and much more. Duracell alkaline batteries deliver reliable power for everyday use. High-density core produces ample power to keep devices ready for use. Enhanced power check permits easy viewing of remaining power with the touch of a button. Date coded and mercury free. Batteries can last up to 10 years in storage. Alkaline AAA batteries come in a pack of 20. 20-pack ensures you have plenty of batteries on hand when you need them.