{"product_id":"bms-5s-20a-lithium-battery-protection-board-pcm-balancer","title":"BMS 5S 20A Li-Ion Battery Protection Board with Balancer","description":"\n\u003ch2\u003eBMS 5S 20A 18650 Lithium Battery Protection Board with Cell Balancer\u003c\/h2\u003e\n\u003cp\u003eKeep your lithium battery packs running safely and efficiently with this compact \u003cstrong\u003e5S 20A Battery Management System (BMS)\u003c\/strong\u003e. Designed for 18650 Li-ion cells, this PCM circuit board actively monitors and manages your battery pack's charge and discharge cycles — automatically protecting your cells and extending their usable lifespan.\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 Built-in overcharge, over-discharge, overcurrent, and short-circuit protection circuits guard your battery pack against hazardous conditions, keeping both your cells and connected devices safe.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActive Cell Balancing:\u003c\/strong\u003e The integrated balancer equalizes voltage across all 5 cells in series, ensuring uniform charging and discharging for optimal pack performance and longevity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Battery Life:\u003c\/strong\u003e Precise charge and discharge control prevents the cell degradation that comes from overcharging or deep discharging, so your battery pack lasts significantly longer.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Standby Power Consumption:\u003c\/strong\u003e Ultra-low static current draw minimizes energy loss when the battery is idle — more efficient and environmentally friendly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomatic Adaptation:\u003c\/strong\u003e Intelligently detects the battery's charging status and automatically adjusts current and voltage — no manual tuning required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Installation:\u003c\/strong\u003e Simply connect the positive and negative terminals of your battery cells to the corresponding board pads. Compact form factor fits easily into DIY power bank builds, e-bike packs, RC projects, and more.\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 cells in 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 Cell Type:\u003c\/strong\u003e 18650 Li-ion \/ Lithium battery\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\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 5S 20A BMS Lithium Battery Protection Board with Balancer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Actual color 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\/10cm-wireless-led-motion-sensor-night-light-type-c-rechargeable-cabinet-wardrobe-lamp-for-staircase-backlight-kitchen-lighting\"\u003e10CM Wireless LED Motion Sensor Night Light – Type-C Rechargeable\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-precision-japanese-double-edged-hand-saw-sk5-steel-fine-toothed-for-carpentry-and-gardening-6-inch-blade-portable-mini-1\"\u003e1pc Precision Japanese Double-Edged Hand Saw – SK5 Steel, Portable Mini\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-wooden-handle-nylon-bristle-paint-brush-for-oil-painting-dusting-and-cleaning-unrechargeable-hand-tool-set-without-batt-2\"\u003e10Pcs Wooden Handle Nylon Bristle Paint Brush Set – Hand Tool Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.epa.gov\/recycle\/used-lithium-ion-batteries\" target=\"_blank\" rel=\"noopener\"\u003eEPA guidance on lithium-ion battery handling\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does a BMS 5S 20A protection board do?\u003c\/h4\u003e\n\u003cp\u003eA: A BMS (Battery Management System) 5S 20A board manages a series pack of five 18650 lithium cells. It continuously monitors each cell for overcharge, over-discharge, overcurrent, and short-circuit conditions, cutting off the circuit when unsafe levels are detected. The built-in balancer also equalizes cell voltages during charging for improved performance and cell life.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this BMS compatible with 18650 lithium battery packs?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This board is specifically designed for 5-cell (5S) 18650 Li-ion lithium battery configurations. It is commonly used in DIY power banks, e-scooters, RC vehicles, portable energy storage, and other custom lithium battery pack projects requiring up to 20A continuous discharge current.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I install the 5S BMS protection board?\u003c\/h4\u003e\n\u003cp\u003eA: Installation is straightforward — connect the positive and negative terminals of each battery cell to the labeled pads on the circuit board. No additional configuration is needed. The board automatically detects battery status and begins managing charge and discharge cycles immediately upon connection.\u003c\/p\u003e\n\u003ch4\u003eQ: Does this board support cell balancing?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This BMS module includes a built-in cell balancer (PCM balancer) that actively equalizes the voltage across all 5 cells in the series pack. This helps prevent individual cells from becoming over- or under-charged relative to the others, which is key to maximizing the lifespan and safety of your battery pack.\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 BMS 5S 20A protection board do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A BMS (Battery Management System) 5S 20A board manages a series pack of five 18650 lithium cells. It continuously monitors each cell for overcharge, over-discharge, overcurrent, and short-circuit conditions, cutting off the circuit when unsafe levels are detected. 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This helps prevent individual cells from becoming over- or under-charged relative to the others, which is key to maximizing the lifespan and safety of your battery pack.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/pg0se5-51.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/pg0se5-51.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"BMS 5S 20A Li-Ion Battery Protection Board with Balancer\", \"item\": \"https:\/\/pg0se5-51.myshopify.com\/products\/bms-5s-20a-lithium-battery-protection-board-pcm-balancer\"}]}\u003c\/script\u003e","brand":"Babs","offers":[{"title":"Default Title","offer_id":53161198878860,"sku":"\u003cnone\u003e","price":3.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/2862\/6316\/files\/S703f73d4b390481292ac93d98b52f3a9h.webp?v=1787163060","url":"https:\/\/babcustomersupport.com\/products\/bms-5s-20a-lithium-battery-protection-board-pcm-balancer","provider":"Babs","version":"1.0","type":"link"}