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SYTH 13S 48V 30A-500A Battery Charging Discharge Controller PCB Protection Board for 3.7V 3.6V Ternary Lithium Ion Cell Charger,with Balance Function/UART/Smart BT (Including Activation Button) : Amazon.co.uk: Home & Kitchen
Battery Charger Discharger Board Under Over Voltage Protection LED Module 6- 40V | eBay
LED Battery Charger Discharger Board Under Over Voltage Protection Module 6-40V | eBay
LED Battery Charger Discharger Board Under Over Voltage Protection Module 6-40V | eBay
12V/24V 6-60V Battery Charging Control Board Charger Power Supply Switch Module | eBay