YUNTONG Group, one of the leading professional battery & smart charger manufactures in China, was established in 1992. Based on 28 Years experience at producing battery, we own over 100 patents to become one of the leading professional high technology battery manufacturer in China. Excellent quality, technology innovation are our everlasting principle. We are a structured and stable company, devoting in long term business cooperation relationship. Our products all follow the safety guidance to make design & production. As a professional battery expert, we provide customer high quality cells, BMS, battery pack and charger, and our strong R&D team can do customized design to help customer save time to launch new product more quickly. Our factory got ISO9001 certified. Product designed to comply with UL, CE, PSE, KC, RoHS, UN38.3, ect., and e-bike battery BMS have got ISO13849 certified by SGS & TUV. Devoting in the battery industry, we always pursued the perfect product quality and professional service. And product Liability Insurance we buy every Year for double guarantee. Cooperate with us can help you get a huge advantage. We are proud of being your battery solution expert and a reliable partner to provide battery with excellent quality for now and future.