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Established in 2005, Shenzhen Leagend Optoelectronics Co., Ltd. is a leader in battery monitoring and testing technology. We seamlessly integrate product design, research and development, production, sales, and service. Occupying a 3,000 square meter facility, we boast over 13 years of experience in OEM manufacturing for renowned foreign brands. Our production processes adhere strictly to the ISO9001 quality management system, ensuring certification and excellence. Beyond standard testing, every product undergoes a rigorous 8-hour aging test to guarantee superior quality. We warmly welcome OEM and ODM orders, offering expert assistance whether you choose from our existing catalog or require tailored engineering solutions. Our dedicated customer service team is ready to assist with all your sourcing needs.