Type-C Mini 3.7V 4.2V 18650 Lithium Battery Charging Protection Board

Feature highlights:Ultra-small design allows easy embedding in smart wear and micro drones, featuring constant current/constant voltage charging with thermal adjustment to ensure safety and efficiency. It supports automatic recharging, accurate 4.2V charging voltage (1% accuracy), and trickle charging at 2.8V for low battery recovery. With a compact size of 10×7.5×5.2mm, it maximizes space utility while delivering reliable performance for lithium battery charging.

Key Features:

• • USB Type-C input port for easy power connection.
  • Supports 3.7V lithium-ion / Li-Po battery charging.
  • Constant current / constant voltage (CC/CV) charging mechanism.
  • Built-in protection – overcharge, over-discharge, short-circuit, and reverse polarity.
  • LED indicators for charging and full-charge status.
  • Compact and lightweight – perfect for DIY and embedded projects.
  • Plug-and-play design, no soldering needed for testing setups.

Technical Specifications:

• • Input Port: USB Type-C
  • Input Voltage: 4.5V – 5.5V DC
  • Output Voltage: 3.7V – 4.2V DC
  • Charging Current: 1A (typical)
  • Battery Type: 3.7V Lithium-ion / Lithium Polymer
  • Charging Chip: TP4056 / Equivalent IC
  • Protection Features: Over-voltage, over-current, short-circuit, reverse polarity
  • LED Indicators: Red (Charging), Blue/Green (Full Charge)
  • Dimensions: Approx. 10mm × 10mm × 5mm
  • Mount Type: Solder pad / PCB mount
  • Operating Temperature: –10°C to +85°C

Package Includes:

• • 1 x MIni Type-C 3.7V 4.2V 18650 Lithium Battery Charger Board Charging Power Protection Module Constant Current Constant Voltage