{"product_id":"usb-c-bms-2s-3s-4s-18650-lithium-battery-charger-board-boost-module","title":"USB-C BMS 2S 3S 4S 18650 Battery Charger Board Boost Module","description":"\u003ch2\u003eUSB-C BMS Lithium Battery Charger Board with Step-Up Boost Module\u003c\/h2\u003e\n\u003cp\u003eTake full control of your DIY power bank or lithium battery project with this compact \u003cstrong\u003eType-C BMS Charger Board\u003c\/strong\u003e. 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.\u003c\/p\u003e\n\n\u003cp\u003eWhether 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.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB Type-C Input:\u003c\/strong\u003e Modern, reversible charging port for fast and convenient power delivery\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Cell Support:\u003c\/strong\u003e Compatible with 2S, 3S, and 4S 18650 lithium and Li-Po polymer battery configurations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelectable Charge Current:\u003c\/strong\u003e Available in 1A, 2A, and 4A options to suit your battery capacity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated BMS Protection:\u003c\/strong\u003e Built-in Battery Management System guards against overcharge, over-discharge, and short circuit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStep-Up Boost Converter:\u003c\/strong\u003e Onboard boost module steps up voltage for stable, regulated output to your device or load\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact PCB Design:\u003c\/strong\u003e Lightweight and space-efficient — ideal for embedding in custom power bank enclosures or DIY electronics\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Works with 18650 cells, Li-Po pouches, and other lithium polymer battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Interface:\u003c\/strong\u003e USB Type-C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCell Configuration:\u003c\/strong\u003e 2S \/ 3S \/ 4S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharge Current:\u003c\/strong\u003e 1A \/ 2A \/ 4A (select your variant)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Type:\u003c\/strong\u003e 18650 Li-Ion \/ Li-Po Polymer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModule Type:\u003c\/strong\u003e BMS + Step-Up Boost\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY power bank builds\u003c\/li\u003e\n  \u003cli\u003eCustom lithium battery packs\u003c\/li\u003e\n  \u003cli\u003eElectronics prototyping and maker projects\u003c\/li\u003e\n  \u003cli\u003ePortable device charging enclosures\u003c\/li\u003e\n  \u003cli\u003eRC and robotics battery management\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/clip-on-car-fan-led-display-199-speeds-usb-type-c\"\u003eClip-On Car Fan LED Display 199 Speeds | USB \u0026amp; Type-C\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does BMS stand for and why is it important in a lithium battery charger board?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between 2S, 3S, and 4S configurations?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this board to build a USB power bank from 18650 cells?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Which charge current variant should I choose — 1A, 2A, or 4A?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does BMS stand for and why is it important in a lithium battery charger board?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"BMS stands for Battery Management System. It is an integrated circuit that monitors and protects your lithium battery cells during charging and discharging. 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