? 18650 Lithium Battery Charger Module

? What’s this project about?

This project is a compact charger module designed for a single 18650 lithium-ion battery. The board allows safe and convenient charging of lithium batteries using a 5V USB power source.

It is useful for many electronics projects such as:

? Portable electronics

? IoT devices

? Robotics projects

? DIY power banks

? Battery-powered circuits

? Why did I make this project?

I created this module to have a simple and reliable charging solution for 18650 batteries in my DIY electronics projects.

Instead of using large commercial modules, I wanted a small PCB that could easily be integrated into custom devices. Designing this board also helped me practice power electronics and PCB layout for battery circuits.

?? How does it work?

The module uses the popular TP4056 lithium battery charging IC, which is designed specifically for single-cell lithium-ion batteries like the 18650 lithium-ion battery.

? Main Components

TP4056 battery charging IC

USB input connector (5V)

Charging status LEDs

Protection circuit (optional depending on design)

Battery connection pads

? Operation

1?? A 5V power source (USB) is connected to the module.

2?? The TP4056 IC regulates the charging current and safely charges the battery.

3?? The charging process follows the constant current / constant voltage method.

4?? LEDs indicate the charging status:

? Charging

? Fully charged

5?? Once fully charged, the battery is ready to power your electronics project.

? Features

? Designed for single 18650 lithium battery

? 5V USB charging input

? Stable lithium-ion charging circuit

? Charging status LEDs

? Compact PCB size for easy integration