{"product_id":"4s-8a-bms-li-ion-battery-protection-board-14-8v-charger-module","title":"4S 8A BMS Li-ion Battery Protection Board – 14.8V Charger Module","description":"\n\u003ch2\u003e4S 8A BMS Polymer Li-ion Battery Protection Board\u003c\/h2\u003e\n\u003cp\u003eKeep your 4-series lithium-ion battery pack safe and performing at its best with this compact \u003cstrong\u003e4S 8A Battery Management System (BMS) Protection Board\u003c\/strong\u003e. Designed for four 3.7V Li-ion cells wired in series (14.8V nominal), this SMD module guards against overcharge, over-discharge, and overcurrent — making it an essential component for DIY battery packs, e-bike builds, RC projects, portable power stations, and more.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4S Configuration:\u003c\/strong\u003e Optimised for 4 serial 3.7V Li-ion \/ polymer cells (14.8V total)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8A Continuous Current:\u003c\/strong\u003e Handles up to 8A charge and discharge current\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Layer Protection:\u003c\/strong\u003e Overcharge protection, over-discharge protection, overcurrent protection, and short-circuit cut-off\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e Rated from -40°C to +85°C for reliable operation across environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSMD Package:\u003c\/strong\u003e Compact surface-mount design for easy integration into custom battery assemblies\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Regulator Type:\u003c\/strong\u003e Maintains stable cell balance and pack voltage\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo High-Concern Chemicals:\u003c\/strong\u003e Free from restricted hazardous substances\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNew Condition:\u003c\/strong\u003e Brand-new unit, quantity 1 per order\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfiguration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4S (4 cells in series)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCell Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.7V per cell (14.8V pack)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContinuous Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSMD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolymer Li-ion batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY lithium battery packs\u003c\/li\u003e\n  \u003cli\u003eE-bikes and electric scooters\u003c\/li\u003e\n  \u003cli\u003eRC vehicles and drones\u003c\/li\u003e\n  \u003cli\u003ePortable power banks and power stations\u003c\/li\u003e\n  \u003cli\u003eLaptop and computer battery assemblies\u003c\/li\u003e\n  \u003cli\u003eSolar energy storage systems\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\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\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 a 4S BMS protection board do?\u003c\/h4\u003e\n\u003cp\u003eA: A 4S Battery Management System (BMS) protection board monitors and manages four lithium-ion cells connected in series. It prevents overcharging, over-discharging, overcurrent draw, and short circuits — protecting both the battery cells and connected devices from damage and extending overall pack lifespan.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this BMS board compatible with all 3.7V Li-ion batteries?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, this board is designed specifically for standard 3.7V nominal lithium-ion and lithium polymer (LiPo) cells arranged in a 4-series configuration (4S), giving a total pack voltage of approximately 14.8V. Always verify that your cells' charge cutoff voltage (typically 4.2V per cell) matches the board's specifications before use.\u003c\/p\u003e\n\u003ch4\u003eQ: Can this board handle both charging and discharging?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This BMS module supports both charging and discharging protection at up to 8A continuous current. It automatically cuts off the circuit if an overcurrent or short-circuit condition is detected during either charge or discharge cycles.\u003c\/p\u003e\n\u003ch4\u003eQ: What does the wide operating temperature range mean for my project?\u003c\/h4\u003e\n\u003cp\u003eA: Rated from -40°C to +85°C, this protection board can function reliably in extreme cold or hot environments, making it suitable for outdoor power systems, automotive applications, and industrial DIY projects where temperatures may fluctuate significantly.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does a 4S BMS protection board do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A 4S Battery Management System (BMS) protection board monitors and manages four lithium-ion cells connected in series. 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