TP4056 18650 1 Cell Charger Module Micro USB 4.2V 0.8A

The Efillooc TP4056 Single-Cell 18650 Charger Module is a compact, highly efficient lithium battery charging board designed specifically for 3.7V 18650 cells. Powered via a standard Micro USB port or direct solder pads, it provides linear constant-current/constant-voltage (CC/CV) charging up to 4.2V. Featuring configurable charging rates (0.3A, 0.5A, or 0.8A) and dual LED status indicators, it is ideal for DIY power banks, robotics, and portable battery-powered electronics.

Technical Specifications

Key Features

• Configurable Charge Current (0.3A / 0.5A / 0.8A): Set the optimal charging speed for smaller or larger capacity batteries by modifying the onboard current-setting resistor pads.
• Micro USB Power Input: Connects easily to standard 5V smartphone chargers, power banks, USB wall adapters, or computer USB ports.
• Dual LED Status Feedback: Clear visual monitoring with a Red LED illuminating during active charging and a Blue LED turning on when the cell reaches full 4.2V capacity.
• Wide Thermal Tolerance: Operates reliably between -25°C and 85°C, ensuring stability in tough industrial or outdoor DIY enclosures.
• Ultra-Compact Form Factor: Lightweight (30g) single-slot design easily integrates into space-constrained projects and custom battery cradles.

Product Applications & Compatibility

Compatible Batteries:

• 3.7V / 4.2V Single-Cell 18650 Lithium-Ion Batteries
• Single-Cell LiPo (Lithium Polymer) Packs without built-in PCM

Common Use Cases:

• DIY Power Banks & Portable Solar Battery Systems
• Wireless IoT Sensors, ESP32, and Arduino Power Circuits
• Handheld Gaming Consoles, Flashlights, & Custom Electronics Repair
• Standalone 18650 Charging Cradle Upgrades

Frequently Asked Questions

How do I adjust the charging current from 0.8A to 0.3A or 0.5A?

The module features dedicated resistor solder pads on the PCB. By removing or configuring specific onboard resistors according to the board markings, you can lower the default 0.8A charge current down to 0.5A or 0.3A for lower-capacity batteries.

Does this module have built-in battery over-discharge protection?

No. This is a non-protection board module. It controls charging to 4.2V but does not isolate the load when the battery voltage drops during discharge. Ensure your 18650 cell has a protected button top or use an external BMS circuit for discharge protection.

What do the LED lights indicate?

The Red LED stays lit while the lithium battery is actively charging. Once the battery reaches full charge at 4.2V, the Red LED turns off and the Blue LED turns on.

Warranty & Return Policy

• 7-Day Easy Return or Replacement (Terms & Conditions Apply)
• Product must be returned in original condition with intact protective packaging.

You found it on efillooc!