How long does it take to charge my battery? Karyna Updated August 09, 2019 16:25 Follow Your smartwatch’s battery can charge to at least 80% in one hour. Related articles How can I tell when my smartwatch is charging? How do I charge my smartwatch? How long will my smartwatch battery last? What is Battery Saver? I've placed the smartwatch onto the charger. Why do I not see the charging indicator on the display? Comments 0 comments Article is closed for comments.