Panasonic Lithium Battery is designed specifically for use in photography equipment, for flashlights that need instant power and has a low internal resistance to provide rapid flash recovery time and quick shooting. Features minimal weight and size, and provide superior performance even in extreme temperatures, a powerful lithium technology thats reliable even in a wide range of operating temperatures (-40C to +70C) This battery is a cylindrical lithium type with a nominal voltage of 6 volts and high capacity of 1550 mAh with a long shelf life of up to 10 years. This lithium photo battery is one of the most powerful available, it is capable of keeping your camera or other high drain devices powered for hours.