Quality watches need a quality battery on-hand to provide consistent voltage and long-lasting power. Energizer 395/399 replacements cell batteries are trusted by top watchmakers from around the world. Features and Benefits Specially engineered to provide dependable high power ratio to weight ratio The battery is only 9.5 millimetres in diameter and 2.7 millimetres in height, with a large capacity of 52mAh - a class-leading power to weight figure Provides an extremely stable supply of 1.55 voltage throughout the entire life of the battery Acts as a replacement for both Energizer 395 and Energizer 399 legacy batteries - this battery can safely replace those legacy batteries without any danger of damaging the watch. Latest battery construction techniques means this battery is completely leak resistant