Description
The 3S 4A 18650 Li-ion Charger Type-C to 12.6V 4A Booster Module is a compact charging and power-management board designed for 3S lithium-ion battery packs. It features a convenient USB Type-C input and supports charging a compatible 3S battery pack up to 12.6V.
This module is suitable for battery packs made from commonly used 3.7V Li-ion cells, including 18650, 14500, and similar cells when configured correctly as a 3S pack. With a charging capability of up to 4A, it can be used in a variety of DIY rechargeable battery and portable power applications.
The compact PCB design makes it easy to integrate into custom electronics projects, portable devices, DIY battery packs, and other lithium-ion-powered systems. Built-in protection features help provide additional protection against common charging and battery-related conditions.
Key Features
- Designed for 3S Li-ion battery packs
- 12.6V maximum charging voltage
- Charging current of up to 4A
- Convenient USB Type-C input
- Compatible with suitable 18650, 14500, and other 3.7V Li-ion cells
- Compact PCB design for easy project integration
- LED indicators for charging/status information
- Built-in overcharge, over-discharge, and short-circuit protection
- Suitable for DIY battery packs and portable electronics
- Useful for custom rechargeable power projects
Applications
The 3S 4A charger/booster module can be used in:
- 3S 18650 Li-ion battery packs
- DIY rechargeable battery projects
- Portable electronics
- Custom power banks and power systems
- Battery-powered electronic devices
- Robotics and embedded projects
- Portable lighting projects
- DIY electronics and power conversion projects
How It Works
A 3S lithium-ion battery pack consists of three compatible Li-ion cells or cell groups connected in series. A fully charged 3S Li-ion pack reaches approximately 12.6V, while its nominal voltage is around 11.1V.
The module uses a USB Type-C power input and provides charging for a compatible 3S battery configuration. The available charging current depends on the input power source, battery pack, wiring, and operating conditions.
Pin Connections
Depending on the specific board version, the main connection points may include:
- VIN+ / VIN-: Input power connection when using a wired power source instead of the Type-C connector.
- BAT+: Positive connection of the compatible 3S battery pack.
- BAT- / GND: Negative connection of the battery pack.
Always check the markings printed on your actual PCB before connecting power or batteries, as pin labels and board layouts can vary between module versions.
Important Safety Note
This type of charger/booster module should not automatically be assumed to provide cell balancing. For a 3S battery pack, use an appropriate 3S BMS with balancing functionality when required by your battery configuration and application.
Use compatible Li-ion cells, correct wiring, and an appropriate power supply. Do not connect cells with different capacities, conditions, or charge levels unless the battery system is specifically designed to handle them.
Specifications
| Specification | Details |
|---|---|
| Module Type | 3S Li-ion Charger / Booster Module |
| Battery Type | Li-ion / Polymer Lithium-ion |
| Compatible Cells | 18650, 14500 and similar 3.7V Li-ion cells |
| Battery Configuration | 3S |
| Nominal Battery Voltage | 11.1V |
| Maximum Charging Voltage | 12.6V |
| Charging Current | Up to 4A |
| Input Connector | USB Type-C |
| Input Power | Type-C power source |
| Protection | Overcharge, over-discharge and short-circuit protection |
| Indicators | LED status indicators |
| Design | Compact PCB module |
| Application | DIY battery packs and portable electronics |
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