Description 3S 4A Lithium Battery Charging Module with Type-C Input | 12.6V 18650 Battery Charger Board (Fixed 4A Output) This 3S 4A Lithium Battery Charging Module with Type-C Input is a high-performance fixed current charger board specially designed for 3-series lithium-ion battery packs (12.6V max). From the product images, the PCB includes a Type-C input (VIN/GND), powerful buck converter section with inductor (100), and clearly labeled BAT output terminals for direct battery connection. ⚠️ Important Note:Although the PCB shows markings like 1A / 2A / 3A / 4A, this module is factory configured for fixed 4A output, and current is not adjustable. The module uses a CC/CV charging method, ensuring safe and efficient charging. The onboard OK (Full) and CR (Charging) LEDs provide real-time status indication, making it simple to use even for beginners. �� Perfect for technicians, DIY battery builders, and electronics projects requiring fast charging. ⚡ Key Features & Highlights �� Designed for 3S Lithium Battery Pack (12.6V Max)Ideal for 3× 18650 lithium-ion batteries in series ⚡ Fixed 4A High-Speed Charging OutputNo adjustment needed – optimized for fast and stable charging �� Type-C Input for Modern CompatibilityEasy to use with standard USB Type-C adapters �� Smart CC/CV Charging SystemEnsures safe charging with constant current constant voltage control �� Dual LED Indicators (OK / CR) �� CR → Charging Mode �� OK → Fully Charged �� High Efficiency Buck Converter DesignStable performance with onboard inductor (100) and power components �� Clearly Marked Terminals (VIN / GND / BAT)Easy wiring and installation for technicians & DIY users ��️ Reliable & Stable Charging CircuitDesigned for consistent output and long-term use �� Specifications Table Parameter Details Product Type Lithium Battery Charging Module Battery Configuration 3S (3 Cells in Series) Input Port USB Type-C Input Voltage 5V Output Voltage 12.6V (Max Charging Voltage) Charging Current Fixed 4A Charging Method CC/CV Indicators OK (Full), CR (Charging) Efficiency High (Buck Converter) PCB Markings VIN, GND, BAT, OK, CR Battery Type Lithium-ion (18650 Supported) ��️ Applications / Use Cases �� 3S 18650 Battery Pack Charging �� Small E-bike / EV Battery Projects �� Portable Speaker Battery Systems �� Emergency Lights & Backup Power �� DIY Electronics & Robotics Projects �� Technician Testing & Repair Work �� Pro Tips (Important for Buyers) ⚠️ Use high current Type-C power supply (minimum 5V 3A–5A) ⚠️ Ensure proper heat dissipation during 4A charging ✅ Always use BMS protection board with battery pack ❌ Do not short BAT terminals
