Maxell 317 SR516SW 0% Mercury 1.55V Silver Oxide Watch Battery (Pack of 5) - Maxell is the first company in Japan to successfully market button-type silver oxide batteries and has many years of experience and know-how. Also, in consideration of the environment, all products are designed to use zero mercury. Additional Details ------------------------------ Product description: Maxell 317 SR516SW 0% Mercury 1.55V Silver Oxide Watch Battery (Pack of 5) - Maxell is the first company in Japan to successfully market button-type silver oxide batteries and has many years of experience and know-how. Also, in consideration of the environment, all products are designed to use zero mercury.