How long will my smartwatch battery last? Karyna November 13, 2019 16:38 Updated Your battery will last up to 24 hours, depending on usage. Related articles How do I charge my smartwatch? I've placed the smartwatch onto the charger. Why do I not see the charging indicator on the display? How do I conserve battery life? How can I change the language of the Wear OS by Google app? My battery won’t charge past a certain percentage. How can I fix this? Comments 0 comments Article is closed for comments.