Energizer, 3V lithium photo battery, comparable to Duracell #DL123AB. 3-Volt e2 Photo Lithium Battery provides optimum, long-lasting performance in cameras, photoflash, calculators, pocket pagers, watches, memory backup and other high-drain applications. Construction is leak-resistant. Battery performs even in extreme temperatures from negative -40 degrees to 140 degrees Fahrenheit. Storage life lasts up to 10 years.