3.7V 1A Ultra-Slim Compact Li-ion Battery Charger Module (4.2V) with Type-C Interface

Description

Product Overview

The 3.7V 1A Ultra-Slim Compact Li-ion Battery Charger Module is a complete, highly efficient charging solution designed specifically for single-cell 3.7V lithium-ion and lithium-polymer (LiPo) batteries. This ultra-compact module combines a reliable TP4056 charging IC with DW01 battery protection circuitry—offering both charging management and essential battery safety features in an extremely slim form factor.

Based on the industry-standard TP4056 linear charging IC from Top Power ASIC, this module implements a proper Constant Current/Constant Voltage (CC/CV) charging algorithm that is essential for lithium battery safety and longevity. It charges 3.7V nominal batteries to the correct full charge voltage of 4.2V with an accuracy of ±1.5%.

What sets this module apart is its integrated DW01A battery protection IC and FS8205A dual MOSFETs, which provide comprehensive protection against overcharge, over-discharge, overcurrent, and short circuits. The “with protection” version is ideal for standalone 18650 cells and other batteries that lack their own built-in protection circuit.

The modern USB Type-C input allows convenient charging via standard USB chargers, power banks, or computer USB ports, while alternative solder pads (IN+/IN-) provide DIY wiring flexibility. The ultra-slim PCB size makes it perfect for portable electronics, DIY power banks, Arduino/ESP32 battery-powered projects, and replacing dead charger circuits in consumer devices.

Key Features

• Integrated Protection Circuit: Includes DW01A battery protection IC and FS8205A dual MOSFETs, providing overcharge protection (4.28V cutoff), over-discharge protection (3.0V cutoff), overcurrent protection (3A), and short-circuit protection

• USB Type-C Input: Modern reversible connector for easy connection to standard USB chargers, power banks, or computer USB ports

• 1A Maximum Charge Current: Default charging current of 1000mA (1A), adjustable by changing the programming resistor for lower current applications

• CC/CV Charging Algorithm: Proper Constant Current / Constant Voltage charging method essential for lithium battery safety and longevity

• Ultra-Slim Compact Design: Extremely low-profile PCB (approx. 3-4mm thickness) allows for integration into tight spaces and slim portable devices

• Dual-Color Status Indicator: Red LED indicates charging in progress; Green/Blue LED indicates fully charged or no battery connected

• Alternative Power Input Pads: IN+ and IN- solder pads allow custom 5V wiring for DIY projects when Type-C is not available

• Thermal Regulation: Automatically reduces charge current if internal die temperature exceeds safe limits, protecting the chip during high-current charging

Technical Specifications