TONGYU Technology is one of the leading professional lithium battery manufacturers in China, established in 2003,As a professional power battery expert, we not only provide customers high quality batteries, but also our senior engineers provide you correct power solution and design for applications according to your products.We have a strong R & D team with experience engineers always continuously research and develop new products, Our products cover the following series: High-rate(LiFePO4) battery, Lithium ion polymer battery(Li-ion), Lithium iron phosphate battery(LiFePO4), High capacity power battery.The products are all CE, UL and ROSH certified. To guarantee product reliability, quality and superb performance, TONGYU has adopted and practiced the ISO9001 Quality Management system, uses only the best grade imported and local raw materials & components and utilizes numerous advanced automatic production facilities.