CD42 Lithium Battery Boost & Charge Module – 3.7V Li-ion Battery Charger & Step-Up Power Supply Module
The CD42 Lithium Battery Boost & Charge Module is a compact power management module designed to charge a single 3.7V lithium-ion battery and boost its voltage to a higher regulated output. It is an excellent solution for DIY electronics, portable power systems, IoT devices, and battery-powered embedded projects.
This module combines lithium battery charging and DC-DC boost functionality in a compact PCB, helping reduce the number of separate power-management circuits required in a project. It can be used with commonly available 18650 Li-ion cells and other compatible 3.7V rechargeable lithium batteries.
The CD42 module is particularly useful when a battery-powered project requires a higher voltage than the battery can directly provide. It can be integrated into projects using Arduino, ESP32, sensors, displays, LEDs, and other low-power electronics, subject to the module's output-current and voltage specifications.
🚀 Key Features
- Combined Li-ion battery charging + boost converter module
- Designed for 3.7V rechargeable lithium batteries
- Suitable for single-cell Li-ion applications
- Boosts battery voltage to a higher DC output
- Compact and lightweight PCB design
- Convenient solution for portable electronics
- Suitable for DIY and embedded applications
- Ideal for battery-powered IoT projects
- Easy to integrate into custom electronic projects
📊 Technical Specifications
| Parameter | Specification |
|---|---|
| Module | CD42 |
| Function | Lithium Battery Charging + Boost |
| Battery Type | 3.7V Li-ion / Li-Po |
| Battery Configuration | 1 Cell (1S) |
| Input | USB/DC input (depending on module version) |
| Output | Boosted DC voltage |
| Battery | 3.7V rechargeable lithium battery |
| Module Type | Power Management / DC-DC Converter |
| Application | Portable Electronics & IoT |
Note: Exact charging current, boost output voltage, maximum output current, connector type, and protection features can vary between CD42 module revisions. Please verify the specifications printed on the module before designing the final product.
📦 Package Includes
- 1 × CD42 Lithium Battery Boost & Charge Module
Battery and connecting wires are not included unless specifically mentioned in the selected product variant.
💡 Recommended Applications
- 18650 battery projects
- Portable power supplies
- DIY rechargeable electronics
- Arduino battery-powered projects
- ESP32 IoT devices
- LED lighting projects
- Wireless sensor nodes
- Portable displays
- Small robotics projects
- Battery-powered automation systems
- DIY electronic gadgets
- Embedded power supply systems
⚠️ Important Safety Information
Use only a compatible rechargeable lithium battery with the module and observe the correct battery polarity. Do not short-circuit the battery terminals or exceed the module's specified input/output ratings.
Lithium-ion batteries can present a fire or damage hazard if improperly charged, connected, or handled. Use an appropriate battery with suitable protection and follow the module manufacturer's specifications.
🌟 Why Choose the CD42 Module?
- Combines charging and voltage boosting in one compact board
- Reduces circuit complexity in portable projects
- Useful for powering electronics from a single Li-ion cell
- Compact form factor for space-constrained designs
- Excellent for DIY, IoT, robotics, and embedded applications
- Convenient solution for rechargeable battery-powered projects