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Changzhou Yufeng Battery Co., Ltd (CZYF), founded in 2001 in Changzhou City, Jiangsu Province, is a national high-tech enterprise and a national specialized, special and new “small giant” enterprise. The company specializes in the research and development, manufacturing and sales of primary lithium manganese batteries. The company is located in Changzhou High-tech Zone Photovoltaic Industrial Park, with a building area of 32,000 square meters and more than 300 employees. The company now produces more than 40 types of primary lithium manganese batteries, with an annual output of nearly 500 million. By 2022, Yufeng's core product primary lithium manganese button battery global market share No.5.