Recommended for use in smoke alarms, flashlights, lanterns, calculators, pagers, door locks, cameras, recorders, radios, CD players, medical equipment, toys and electronic games. Batteries are dependable after 10 years of storage.AAAAlkaline Manganese DioxideCopperTopCopperTop MN1500B10Z General Purpose BatteryDuracellGeneral Purpose BatteryMN1500B10ZMN2400B10ZNoProcter & GambleUnited Stateshttp://www.pg.com