The Sony 3 Volt Lithium Coin Battery provides an excellent combination of high energy and continuous voltage supply. These batteries provide long shelf life for back up energy purposes together with ideal temperature resistance and superior storage capacity. Sony's worldwide reputation for creating unique, attractive, high-quality, advanced technology products rests on a long line of innovations embraced by people from all walks of life. With a diverse product lineup serving a variety of lifestyles and industries, Sony continuously strives to introduce new products and technologies to meet changing market needs. Ideal for watches and electronic equipment.