[. . . ] [. . . ] They should be disposed of properly according to local regulations. Watch Battery Type: SR626SW 1. 5V Silver Oxide Battery Life: The battery is estimated to last 2 years. Battery Replacement: If the back case is sealed, you will need to send the watch to our authorized service center. Many of our watch designs use special gaskets that create a water tight seal between the back plate and the watch case. Customer feedback on the price, duration and headache of this process has prompted us to start putting user serviceable battery hatches in our watches whenever possible. [. . . ] [. . . ]