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 Output
  No adjustment needed – optimized for fast and stable charging
• 🔌 Type-C Input for Modern Compatibility
  Easy to use with standard USB Type-C adapters
• 🧠 Smart CC/CV Charging System
  Ensures safe charging with constant current + constant voltage control
• 🟢 Dual LED Indicators (OK / CR)
  • 🔴 CR → Charging Mode
  • 🟢 OK → Fully Charged
• 🔥 High Efficiency Buck Converter Design
  Stable 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 Circuit
  Designed for consistent output and long-term use

📊 Specifications Table