Li-ion Battery Charger Protection Module (BMS) 4S 30A 14.8V Common Port with Balancing

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Li-ion Battery Charger Protection Module ( BMS ) 4S 30A 14.8V Common Port with Balancing This protection module is designed for 4-cell series (4S) lithium-ion battery packs with a nominal voltage of 14.8V. It combines over-current-capable switching with per-cell balancing in one compact green PCB measuring 62 × 45 × 1.5 mm, as printed directly on the board alongside the model code CF-D34S30A-B and production code 21K05. Features 4S li-ion protection for 14.8V nominal packs with integrated cell balancing. Common-port design – one shared negative terminal (C−) for both charging and discharge, simplifying wiring. 5-pin white JST-style balance connector for reliable cell-tap connection. Compact PCB : 62 × 45 × 1.5 mm as printed on the board; green solder mask. Mounting-ready : four corner holes plus slotted ventilation cut-outs. Specifications Product Type Li-ion battery charger protection module with cell balancing Battery Configuration 4S (4 cells in series), 14.8V nominal li-ion pack Model / PCB Silkscreen CF-D34S30A-B Max Continuous Current 30A Weight 15 g Balancing Integrated Cable Lengh 35 cm Current-Sense Resistors SMD resistors marked R005 on board PCB Dimensions 62 × 45 × 1.5 mm PCB Color Green Mounting 4 corner mounting holes + slotted cut-outs Printed Production Code 21K05 Applications 4S 14.8V li-ion battery packs E-bike, e-scooter and electric mobility battery packs up to 30A. Portable power stations, backup/UPS battery boxes and solar storage packs. LED lighting, inverters and other equipment powered by 4S li-ion batteries. Package Content 1 × Li-ion Battery Charger Protection Module (BMS) 4S 30A 14.8V Common Port with Balancing 1 × 5-Pin Balance Wire Harness Cable with JST Connector