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1-20PCS Mini Lithium Battery Charging Board Module 3.7V 4.2V 18650 Lithium Battery Charger Protection Board Type-C Interface
Product Overview
This compact charging board module is engineered for efficient and safe charging of 18650 lithium‑ion cells. Designed for both hobbyists and professional applications, it supports a 3.7V to 4.2V charging range and features a USB‑Type‑C interface for convenient power delivery. Each module includes built‑in protection circuitry to prevent over‑charge, over‑discharge, short‑circuit, and over‑temperature conditions, ensuring reliable operation in any environment.
Key Features
- Compact 20mm × 20mm footprint – ideal for space‑constrained designs.
- Supports 1–20 cell packs (single or parallel configurations).
- USB‑Type‑C input: 5V/2A, 9V/2A, or 12V/1.5A for flexible power sources.
- Precise 4.2V full‑charge voltage with 0.1V tolerance.
- Integrated protection IC: over‑charge, over‑discharge, short‑circuit, over‑temperature.
- Low power consumption standby mode (≤ 30µA).
- High‑quality surface‑mount components for durability and reliability.
- Easy to solder with standard SMD tools.
- Compatible with most 18650 cells (Li‑ion, Li‑poly, Li‑FeS₂).
Technical Specifications
• Input Voltage: 5V/2A, 9V/2A, 12V/1.5A (USB‑Type‑C)
• Output Voltage: 4.2V (full charge)
• Charging Current: Adjustable 0.5A–2A (default 1A)
• Protection: Over‑charge, over‑discharge, short‑circuit, over‑temperature
• Dimensions: 20mm × 20mm × 3.5mm
• Weight: 3g per module
• Operating Temperature: –20°C to 60°C
• Packaging: 1‑20 pcs per order (bulk discount available)
Compatibility & Applications
• Portable power banks and DIY battery packs
• RC vehicles, drones, and robotics projects
• Battery backup systems for IoT devices
• Smart wearables and handheld gadgets
• Emergency lighting and medical equipment
Installation Guide
1. Connect the USB‑Type‑C cable to the module’s input port.
2. Attach the 18650 cell(s) to the designated terminals, ensuring correct polarity.
3. Secure the module on a PCB or perfboard using standard SMD soldering.
4. Power on – the LED indicator will show charging status.
5. Monitor battery voltage; the protection circuit will automatically cut off at 4.2V.
Warranty & Support
We offer a 12‑month warranty against manufacturing defects. For installation assistance, firmware updates, or troubleshooting, please contact our technical support team at [email protected].
Upgrade your battery management system with this reliable, space‑saving charging board – order now and experience safe, efficient charging for all your lithium‑ion projects.
Price: Original price was: $ 2.38.$ 1.17Current price is: $ 1.17.