Specifications:

• Input Voltage: 4.5V to 5.5V (via USB Type-C)

• Charge Voltage: Fixed at 4.2V ±1%

• Charge Current: Up to 1A, adjustable via the R_PROG resistor

• Charging Method: Constant-Current / Constant-Voltage (CC/CV)

• Charging Accuracy: ±1.5%

• Operating Temperature Range: -10°C to +85°C

• Module Dimensions: Approximately 26mm × 17mm

Features:

1. Type-C USB Input

   • Equipped with a Type-C port for easy and modern connectivity to power sources (e.g., USB adapters, power banks, laptops).

2. Built-in Charging IC – TP4056

   • Manages precise constant current/constant voltage (CC/CV) charging algorithm.

3. Overcharge & Over-discharge Protection (DW01 Chip)

   • Integrated dual protection circuitry protects battery life:

     • Overcharge protection

     • Over-discharge protection

     • Overcurrent and short circuit protection

4. Current Capacity

   • Supports up to 1A charging current (default), adjustable via resistor.

5. Battery Compatibility

   • Designed to charge 3.7V lithium-ion/lithium-polymer batteries (e.g., 18650 cells).

6. Charging Status Indicators

   • Red LED: Charging

   • Blue LED: Fully Charged

7. Trickle Charging & Soft Start

   • Prevents battery damage with soft start and low-voltage trickle charging mode.

8. Compact & Lightweight

   • Small PCB size, ideal for portable battery-powered projects and DIY electronics.

9. Input Voltage Range

   • Operates reliably with 4.5V to 5.5V DC input.

10. Easy Integration

• Ready-to-use with minimal external components; can be used in embedded and IoT projects.

Description:

• The battery charger modules are adopted very mature charging chip, simple peripheral circuit, good protection performance, and high charging precision.
• Battery Voltage: 3.7/4.2V; Fit for: 18650; Charge Current: 1A; Charge Voltage: 4.5-5.5V; Input: TYPE-C; Charge Channel: 1; Size: 29mm x 17mm x 4mm/1.14 inch x 0.67inch x 0.16 inch(L*W*H).
• Complete automatic machining electronic elements, fully tested before delivery, high reliability.
• There are many related videos on the internet, If you are the first time to do this job, we suggest you can watch them first.
• Please note that the charge should disconnect the load OUT terminal on the positive and negative can not be wrong.

Applications:

Ideal for DIY electronics, IoT devices, and portable gadgets requiring safe and efficient battery charging. The Type-C interface ensures compatibility with modern USB power sources, including phone chargers and power banks.