Energizer 2CR5 e2 Lithium Photo 6-Volt Battery - For Multipurpose - 2CR5 - 6V DC - 6 Batteries/Box - 4 Box/Carton 6-Volt e2 Photo Lithium Battery is designed for use with cameras, photoflash, calculators, pocket pagers, watches, memory backup and other high-drain applications. 6-Volt e2 Photo Lithium Battery performs even in extreme temperatures. Storage life up to 10 years.