Duracell CopperTop Alkaline AAA Batteries, 4/Pack – Long-life alkaline AAA batteries provide the best, longest power source. Operate reliably in temperature extremes of negative 20 degrees Celsius to 54 degrees Celsius. Recommended for use in smoke alarms, flashlights, lanterns, calculators, pagers, cameras, recorders, radios, meters, scanners, CD players, medical equipment, toys and electronic games. Long-lasting and dependable after seven years of storage.