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JBD SP04S010A 3S-4S smart BMS balancer board
3S/4S LiFePO4 or Li-ion, 20-35A continuous, balancing, smart (UART/BT class per JBD line); exact connector/wire specs on product page not captured
JBD BMS 3S-4S Smart BMS 20A/30A/50A/80A with UART/RS485/CANBUS
3S-4S LiFePO4/Li-ion, 20-80A variants, UART/RS485/CANBUS functions per product title