A battery designed by Japanese engineers, which meets the highest standards of modern button batteries. Has a very long shelf life, a wide range of safe operation temperatures and is resistant to leaking. Perfect for watches, fitness, Key FOB's or healthcare devices, and other electronic devices. Additional Details ------------------------------ Product description: A battery designed by Japanese engineers, which meets the highest standards of modern button batteries. Has a very long shelf life, a wide range of safe operation temperatures and is resistant to leaking. Perfect for watches, fitness, Key FOB's or healthcare devices, and other electronic devices.