{"product_id":"5s-20a-bms-18650-li-ion-battery-protection-board-pcm-balancer-module","title":"5S 20A BMS 18650 Li-ion Battery Protection Board PCM Balancer","description":"\n\u003ch2\u003e5S 20A BMS 18650 Li-ion Battery Protection Board with Cell Balancer\u003c\/h2\u003e\n\u003cp\u003eKeep your lithium battery packs running safely and efficiently with this \u003cstrong\u003e5S 20A Battery Management System (BMS) Protection Board\u003c\/strong\u003e. Designed for 18650 Li-ion and lithium battery packs, this compact PCM (Protection Circuit Module) features built-in cell balancing, automatic charge regulation, and multi-layer safety protection — all in a small, easy-to-install form factor. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Layer Safety Protection:\u003c\/strong\u003e Guards against overcharge, over-discharge, short circuit, and overheating to keep your battery pack and connected devices secure at all times.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Battery Life:\u003c\/strong\u003e Intelligent charge\/discharge control prevents harmful voltage extremes, helping your 18650 cells last significantly longer over repeated cycles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Static Current Consumption:\u003c\/strong\u003e Energy-efficient design minimises idle power drain, making this board an eco-friendly choice for power bank and DIY battery projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomatic Cell Balancing:\u003c\/strong\u003e The integrated balancer automatically identifies each cell's charge state and adjusts current and voltage accordingly — no manual tuning required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimple Installation:\u003c\/strong\u003e Connect the positive and negative terminals of your battery cells to the corresponding board pads and you're ready to go. The compact, lightweight PCB fits easily into most enclosures and DIY builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 5S (5-cell series)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContinuous Discharge Current:\u003c\/strong\u003e 20A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Battery Type:\u003c\/strong\u003e 18650 Li-ion \/ Lithium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e PCB with plastic components\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e 1 × BMS Protection Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY power bank builds and portable battery packs\u003c\/li\u003e\n  \u003cli\u003eElectric bike (e-bike) and scooter battery modules\u003c\/li\u003e\n  \u003cli\u003eRC vehicle and robotics battery systems\u003c\/li\u003e\n  \u003cli\u003eSolar energy storage and off-grid projects\u003c\/li\u003e\n  \u003cli\u003eCustom 18650 battery pack assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Actual colour may vary slightly from images due to monitor brightness and lighting conditions. Please allow for minor measurement tolerances.\u003c\/p\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-large-capacity-battery-storage-organizer-box-batteries-not-included-vintage-beer-crate-appearance-holds-30-aaa-batteries\"\u003e1PC Large Capacity Battery Storage Organizer Box – Holds 30 AAA Batteries\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-10g-high-grade-silicon-grease-lubricant-o-lubrication-good-odorless-smoothness-for-o-rings-tube-silicone-grease-lubricant\"\u003e1PC High Grade Silicone Grease Lubricant for O-Rings\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 5S BMS protection board do for my lithium battery pack?\u003c\/h4\u003e\n\u003cp\u003eA: A 5S BMS (Battery Management System) monitors and manages a series string of 5 lithium cells. It provides overcharge protection, over-discharge protection, short circuit protection, and cell balancing — ensuring each cell stays within safe voltage limits for maximum safety and longevity.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this BMS board compatible with all 18650 lithium cells?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, this 5S 20A BMS protection board is designed to work with standard 18650 Li-ion lithium cells wired in a 5-cell series configuration. It is widely used in DIY power banks, e-bike battery packs, and other custom lithium battery projects.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I install the BMS protection board?\u003c\/h4\u003e\n\u003cp\u003eA: Installation is straightforward — connect the positive and negative terminals of each battery cell group to the corresponding B+ and B- pads on the board, then connect your load and charger to the P+ and P- ports. No special tools or technical expertise are required for basic assembly.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does a 5S BMS protection board do for my lithium battery pack?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A 5S BMS (Battery Management System) monitors and manages a series string of 5 lithium cells. 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