Changzhou Yufeng Battery Co., Ltd. (CZYF) is a wholly-owned subsidiary of Changzhou Yufeng Power Co., Ltd., established in Changzhou City, Jiangsu Province in 2001, and is a national high-tech enterprise and a national specialized and new "little giant" enterprise. The company focuses on the research and development, manufacturing and sales of primary lithium-manganese batteries. The company is located in the photovoltaic industrial park of Changzhou High-tech Zone, with a construction area of 32,000 square meters and more than 300 employees. Now it produces more than 40 kinds of lithium-manganese batteries, with an annual output of nearly 500 million. For more than 20 years, the company has adhered to technological innovation, lean production and excellent management, and successfully established brands such as "Henli Max", "SUYU MAX", "NSN" and passed the evaluation of provincial engineering technology research center and municipal enterprise technology center, and has a significant competitive advantage in high-power and micro-power electronic products. The company's products are widely used in electronic shelf labels, intelligent transportation, intelligent security, instrumentation consumer electronics, smart medical and other industries, and have won unanimous affirmation and long-term support from cooperative customers.