OEM Duracell CopperTop General Purpose Batteries, size AA, come in a convenient pack of 20. These batteries are engineered to deliver the right level of power for various devices including flashlights, portable electronics, remotes, calculators, smoke alarms, door locks, cameras, and wireless mice/keyboards. Featuring DuraLock Power Preserve Technology, they are guaranteed fresh for 10 years in storage, ensuring reliability when you need it most.