What about Xinwangda New Energy Co., Ltd.?

Not bad. Xinwangda New Energy Co., Ltd. is a company specializing in mobile phone battery packs, and its profit model is ODM. It buys batteries, assembles them with its own BMS system and sells them to large mobile phone manufacturers, such as Apple, Huawei, Vivo, Oppo, Xiaomi, Moto and Voice. The company's mobile phone battery accounts for 60%, intelligent hardware accounts for 15.86% and power battery accounts for 3.36%. Exports accounted for 46%.