USB-C BMS 2S 3S 4S 18650 Battery Charger Board Boost Module

$5.36 $5.96

Size 4S 4A 4S 1A 4S 2A 3S 2A 3S 4A 2S 4A 3S 1A 2S 1A 2S 2A

USB-C BMS Lithium Battery Charger Board with Step-Up Boost Module

Take full control of your DIY power bank or lithium battery project with this compact Type-C BMS Charger Board. Compatible with 2S, 3S, and 4S cell configurations and available in 1A, 2A, and 4A variants, this versatile module combines a Battery Management System (BMS), USB-C charging input, and a step-up boost converter in one tidy board — perfect for Li-Po and Li-Ion 18650 polymer battery packs.

Whether you're building a portable power bank, a custom battery enclosure, or an electronics project, this board delivers reliable charging, over-charge protection, and regulated output in a minimal footprint.

Key Features

USB Type-C Input: Modern, reversible charging port for fast and convenient power delivery
Multi-Cell Support: Compatible with 2S, 3S, and 4S 18650 lithium and Li-Po polymer battery configurations
Selectable Charge Current: Available in 1A, 2A, and 4A options to suit your battery capacity
Integrated BMS Protection: Built-in Battery Management System guards against overcharge, over-discharge, and short circuit
Step-Up Boost Converter: Onboard boost module steps up voltage for stable, regulated output to your device or load
Compact PCB Design: Lightweight and space-efficient — ideal for embedding in custom power bank enclosures or DIY electronics
Wide Compatibility: Works with 18650 cells, Li-Po pouches, and other lithium polymer battery packs

Specifications

Input Interface: USB Type-C
Cell Configuration: 2S / 3S / 4S
Charge Current: 1A / 2A / 4A (select your variant)
Battery Type: 18650 Li-Ion / Li-Po Polymer
Module Type: BMS + Step-Up Boost
Country of Origin: Made in Mainland China

Perfect For

DIY power bank builds
Custom lithium battery packs
Electronics prototyping and maker projects
Portable device charging enclosures
RC and robotics battery management

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Frequently Asked Questions

Q: What does BMS stand for and why is it important in a lithium battery charger board?

A: BMS stands for Battery Management System. It is an integrated circuit that monitors and protects your lithium battery cells during charging and discharging. The BMS on this board prevents overcharging, over-discharging, and short circuits, which helps extend battery life and keeps your DIY power bank or battery pack operating safely.

Q: What is the difference between 2S, 3S, and 4S configurations?

A: The "S" number refers to how many lithium cells are connected in series. A 2S pack has two cells in series, a 3S pack has three, and a 4S pack has four. More cells in series increases the total pack voltage. This USB-C BMS charger board supports all three configurations, making it flexible for a wide range of DIY lithium battery projects using 18650 or Li-Po polymer cells.

Q: Can I use this board to build a USB power bank from 18650 cells?

A: Yes! This board is specifically designed for DIY USB power bank builds. The USB-C input charges your 18650 or Li-Po battery cells, the integrated BMS protects them, and the step-up boost converter regulates the output voltage — giving you a complete, compact charging and power management solution in a single module.

Q: Which charge current variant should I choose — 1A, 2A, or 4A?

A: Choose based on your battery pack's capacity and desired charge speed. As a general guideline, the charge current should not exceed 1C of your battery's capacity (e.g., a 2000mAh pack should charge at no more than 2A). For smaller packs or slower, gentler charging, select 1A; for larger capacity packs where faster charging is desired, choose 2A or 4A.