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Keenso-- 4S 10A Lithium Battery Protection Board Li-ion Cell BMS PCB Board. Support over charge protection, over discharge protection, and short circuit protection. This product has gone through load and aging test for quality assurance. Great choice for you! WE SELLER HAS TO SAY: Our team is doing all we can to provide good quality products in reasonable price for our loyal customers. We all try our best to implement " customer first" concept in the process of product designing, quality monitoring, price maintaining and after-sales service. As an responsible seller, we promise that 100% money refund about damaged product. If your have any product issues, please do not hesitate to contact us. Just feel free to order our product . Sincere thanks for your browsing and support! Features: 1. 100% brand new and high quality. 2. This protection board is suitable for 4 series Li-ion cell. 3. Adopt precision integrated circuit for fast and safe charging. 4. Support over charge protection, over discharge protection, and short circuit protection. 5. This product has gone through load and aging test for quality assurance. Specification: Battery type: 3.7V ternary cell, lithium manganate cell, lithium cobalt cell Discharge current: 10A Weight: Approx. 6g Package list: 1 * Lithium Battery Protection Board Note: 1. This protection board has no balance charging function. 2. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 3. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.