2S-4A 18650 Lithium Ion Charger Type C to 2S 8.4V 4A Booster

Description

The 2S 4A 18650 Li-ion Charger Type-C to 8.4V 4A Booster Module is a compact charging and power module designed for 2S lithium-ion battery packs. It features a convenient USB Type-C input and is designed to charge a compatible 2S battery pack to a maximum voltage of 8.4V.

This module is suitable for battery packs made using compatible 3.7V Li-ion cells, including commonly used 18650 and 14500 batteries, when configured as a 2S pack. With a charging capability of up to 4A, it can be used for a wide range of DIY rechargeable battery and portable power applications.

Its compact PCB design makes it easy to integrate into custom electronics, battery-powered devices, portable projects, and DIY power systems. The module also includes protection features intended to help protect the charging system and connected battery under common fault conditions.

Key Features

• Designed for 2S Li-ion battery packs
• 7.4V nominal battery voltage
• 8.4V maximum charging voltage
• Charging current of up to 4A
• Convenient USB Type-C input
• Compatible with suitable 18650, 14500 and similar 3.7V Li-ion cells
• Compact PCB design
• LED indicators for charging/status indication
• Overcharge, over-discharge and short-circuit protection
• Suitable for DIY battery packs and portable electronics
• Easy to integrate into custom power projects

Applications

The 2S 4A Li-ion charger/booster module can be used for:

• 2S 18650 battery packs
• DIY Li-ion battery assemblies
• Portable electronics
• Rechargeable power projects
• Battery-powered devices
• Robotics and embedded electronics
• Portable lighting systems
• Custom electronics projects
• DIY power supply applications

2S Battery Configuration

A 2S lithium-ion battery pack consists of two compatible 3.7V Li-ion cells or cell groups connected in series.

A typical 2S Li-ion pack has:

• Nominal voltage: 7.4V
• Maximum charging voltage: 8.4V
• Configuration: 2S
• Battery chemistry: Li-ion / Polymer Lithium-ion

Always use compatible cells with suitable specifications and connect the battery pack according to the markings provided on the actual module.

USB Type-C Input

The built-in USB Type-C connector provides a convenient way to supply input power to the module. It can be useful when designing compact rechargeable battery systems where a modern and easily available charging connector is preferred.

The actual charging performance depends on the input power supply, battery capacity, wiring, cell condition, and other operating conditions.

Protection Features

The module is listed with protection features designed to help protect the battery and charging circuit against common conditions, including:

• Overcharge
• Over-discharge
• Short circuit

These protection functions help improve the safety and reliability of the module when used correctly.

How to Connect

The exact terminal markings can vary depending on the PCB version, so always follow the labels printed on your actual board.

Common connections may include:

• VIN+ / VIN-: Input power connection when using a wired power source.
• BAT+: Positive (+) connection of the 2S battery pack.
• BAT- / GND: Negative (-) connection of the 2S battery pack.

Important BMS Note

A basic charger/booster module should not be assumed to provide individual-cell balancing. For a 2S lithium-ion battery pack, use an appropriate 2S BMS with balancing functionality when required by your battery configuration.

The BMS should be correctly connected to the battery cells according to its wiring and terminal markings. Use a suitable charger and compatible Li-ion cells for the application.

Specifications