Where can I purchase the battery? We suggest you purchase from official YI website, Amazon or other major online retailer. Related articles Where I can purchase batteries for my Kami Wire-Free Outdoor Camera? What should I do if the camera does not charge? What should I do if the charging indicator light on the battery charger does not light up? What are the battery specification and charging requirements with YI 4K+ Action Camera? Why does the battery drain so quickly? What's the battery life in normal conditions?