Long-life alkaline AA batteries 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 & electronic games. Batteries are long-lasting & dependable after 10 years of storage. Include “freshness dating” on each package & battery.