Product Overview
The 18650 Lithium Battery Charging Boost Module combines a lithium battery charger and adjustable boost converter on a single PCB, making it an excellent choice for DIY electronics and embedded projects. Powered by the CSM4056T Lithium Battery Charging IC, the module provides safe Constant Current / Constant Voltage (CC/CV) charging for a single 3.7V lithium-ion battery through the convenient USB Type-C connector.
After charging, the onboard boost converter steps the battery voltage up to an adjustable output ranging from 4.2V to 28V, allowing the module to power a wide variety of electronic devices from a single lithium battery.
Its compact size, stable performance, and simple operation make it suitable for portable power supplies, battery-powered IoT devices, Arduino projects, ESP32 development boards, LED lighting, wireless sensors, robotics, and many other DIY applications.
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Features
- Built-in CSM4056T Lithium Battery Charging IC
- USB Type-C 5V charging input
- Supports 1 × 3.7V 18650 Lithium-ion battery
- Constant Current / Constant Voltage (CC/CV) charging
- Adjustable output voltage from 4.2V to 28V
- High-efficiency DC-DC boost converter
- Multi-turn precision potentiometer for output voltage adjustment
- Charging and boost functions integrated into one module
- LED charging status indicators
- Compact PCB design
- Easy to integrate into portable electronic projects
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Technical Specifications
| Parameter |
Value |
| Charging IC |
CSM4056T |
| Input Voltage |
5V DC |
| Input Connector |
USB Type-C |
| Battery Type |
Single-cell Lithium-ion (3.7V) |
| Compatible Battery |
18650, 14500, 16340 and other 3.7V Li-ion cells |
| Charging Method |
Constant Current / Constant Voltage (CC/CV) |
| Charge Termination Voltage |
4.2V ±1% |
| Maximum Charging Current |
Up to 1A |
| Output Voltage |
Adjustable 4.2V – 28V |
| Boost Converter |
High Efficiency DC-DC Step-Up |
| Output Adjustment |
Multi-turn Potentiometer |
| Status Indicators |
Charging / Fully Charged LED |
| Protection |
Overcharge, Automatic Charge Termination, Thermal Regulation |
| PCB Type |
Compact Integrated Charging & Boost Module |
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About the CSM4056T Charging IC
The onboard CSM4056T is a dedicated single-cell lithium-ion battery charging IC designed specifically for rechargeable lithium batteries. It uses the industry-standard Constant Current / Constant Voltage (CC/CV) charging algorithm to maximize battery life and charging efficiency.
Key advantages of the CSM4056T include:
- Accurate 4.2V charge termination
- Automatic charging control
- Thermal regulation
- Stable charging performance
- Suitable for 3.7V lithium-ion batteries
- Reliable and efficient battery charging
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Applications
- ESP32 Projects
- ESP8266 Projects
- Arduino Projects
- Raspberry Pi Portable Power
- IoT Devices
- Battery Backup Systems
- DIY Power Banks
- Portable Test Equipment
- LED Lighting Projects
- Wireless Sensor Nodes
- Robotics
- Portable Electronics
- Rechargeable DIY Devices
- Electronic Prototyping
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Package Includes
- 1 × 18650 Lithium Battery Charging Boost Module Type-C Adjustable Output (CSM4056T IC)
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Important Notes
- Designed for one 3.7V lithium-ion battery only.
- Do not connect multiple batteries in series.
- Adjust the output voltage before connecting your load.
- Use a quality 5V USB power adapter for best charging performance.
- Ensure correct battery polarity during installation.
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