Energizer Photo battery # CR2 size, 2 pack The Energizer 3-volt lithium photoelectronic battery was designed for use in photographic devices, calculators, memory backup, pocket pagers, watches, and other demanding equipment. This lithium battery delivers endurance and reliability in high and low temperature operations and has a storage life of up to 10 years when stored at room temperature.Specifications and Features: Precise energy, perfectly aligned to the different functions of the photo devices Last much longer than ordinary alkaline batteries Low self-discharge rate Designed for use in photographic devices, calculators, memory backup, pocket pagers and more Delivers endurance and reliability in high and low temperature operations Storage life of up to 10 years when stored at room temperature