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Founded in 2005, Shenzhen Leagend Optoelectronics Co., Ltd. has consistently led the charge in battery monitoring and testing technology. Our holistic approach encapsulates product design, research and development, production, sales, and after-sales service. Our 3,000 square meter factory is a testament to over 13 years of OEM expertise for elite international brands. We adhere strictly to ISO9001 quality management protocols, ensuring our products undergo rigorous testing, including an exhaustive 8-hour aging process to meet unparalleled quality standards. We eagerly welcome OEM and ODM collaborations, whether you select an existing product from our extensive catalog or seek bespoke engineering solutions. Our dedicated customer service team stands ready to support your sourcing needs with unparalleled excellence.