Get dependable, long-lasting power from AA CopperTop batteries. These batteries have been engineered to deliver the power you need for all your common devices. They are recommended for use in smoke alarms, flashlights, lanterns, calculators, pagers, door locks, cameras, recorders, radios, CD players, medical equipment, toys and electronic games. Duralock Power Preserve Technology ensures they are dependable after 10 years of storage.