{"product_id":"4s-30a-bms-lifepo4-lithium-battery-protection-board-with-balance","title":"4S 30A BMS LiFePO4 Lithium Battery Protection Board with Balance","description":"\u003ch2\u003e4S 30A BMS Battery Protection Board with Cell Balancing\u003c\/h2\u003e\n\u003cp\u003eKeep your lithium battery packs running safely and efficiently with this 4-cell (4S) Battery Management System (BMS) protection board. Designed for both LiFePO4 (3.2V, 12.8V total) and standard lithium-ion (3.7V, 14.8V total) chemistries, it delivers 30A continuous current handling along with built-in active cell balancing — making it an ideal choice for 18650, 32650, and similar cylindrical battery pack builds.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eWhy You Need a Quality BMS\u003c\/h3\u003e\n\u003cp\u003eA Battery Management System is the essential safeguard between your battery cells and your devices or load. Without proper protection, lithium cells are vulnerable to overcharge, over-discharge, overcurrent, and thermal runaway. This board monitors and manages all of these conditions automatically, extending the life of your battery pack and keeping your build safe.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Chemistries:\u003c\/strong\u003e LiFePO4 (3.2V per cell \/ 12.8V pack) and Lithium-Ion (3.7V per cell \/ 14.8V pack)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4S Configuration:\u003c\/strong\u003e Supports 4 cells in series for 12.8V or 14.4–14.8V battery packs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e30A Continuous Current Rating:\u003c\/strong\u003e Handles demanding loads with stable performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In Cell Balancing:\u003c\/strong\u003e Equalizes individual cell voltages during charging for longer cycle life and improved capacity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOvercharge Protection:\u003c\/strong\u003e Automatically disconnects when cells reach maximum voltage\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOver-Discharge Protection:\u003c\/strong\u003e Cuts off output before cells drop to damaging voltage levels\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOvercurrent \u0026amp; Short-Circuit Protection:\u003c\/strong\u003e Instantly responds to fault conditions to protect both the board and your cells\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact SMD Design:\u003c\/strong\u003e Space-saving surface-mount construction for easy integration into custom battery packs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in 1, 2, or 3-Pack Quantities:\u003c\/strong\u003e Stock up for multiple builds or share with a project partner\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 4S (4 cells in series)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Cell Voltages:\u003c\/strong\u003e 3.2V (LiFePO4) \/ 3.7V (Li-ion)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePack Voltages:\u003c\/strong\u003e 12.8V (LiFePO4) \/ 14.4–14.8V (Li-ion)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContinuous Discharge Current:\u003c\/strong\u003e 30A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Cell Formats:\u003c\/strong\u003e 18650, 32650, and similar cylindrical cells\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBalancing:\u003c\/strong\u003e Yes (passive\/active balancing included)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e SMD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1, 2, or 3 × BMS 4S 30A Protection Board with Balance (depending on quantity selected)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExplore More Electronics \u0026amp; Tools\u003c\/h3\u003e\n\u003cp\u003eLooking for other electronics essentials? Check out our \u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e for diagnosing electronic faults, or browse our \u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge\u003c\/a\u003e for precision DIY workshop tools.\u003c\/p\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: Is this BMS board compatible with both LiFePO4 and standard lithium-ion (18650) batteries?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! This 4S BMS protection board supports both LiFePO4 cells (3.2V per cell, 12.8V pack) and standard lithium-ion cells (3.7V per cell, 14.4–14.8V pack), including popular formats like 18650 and 32650 cylindrical cells. Just ensure you select or configure the correct voltage thresholds for your cell chemistry.\u003c\/p\u003e\n\u003ch4\u003eQ: What does the cell balancing feature do?\u003c\/h4\u003e\n\u003cp\u003eA: Cell balancing ensures that all four cells in your series pack charge and discharge evenly. Over time, individual cells can drift apart in voltage, reducing overall pack capacity and potentially damaging weaker cells. The built-in balancing circuit corrects these differences during charging, maximizing pack longevity and usable capacity.\u003c\/p\u003e\n\u003ch4\u003eQ: Can this board handle 30A continuous discharge?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, this BMS is rated for 30A continuous discharge current. It is well-suited for moderate-to-high power applications such as electric tools, DIY power banks, solar storage, and more. Always ensure your wiring and connectors are also rated to handle the current you plan to draw.\u003c\/p\u003e\n\u003ch4\u003eQ: How many boards will I receive?\u003c\/h4\u003e\n\u003cp\u003eA: You can choose from a 1-pack, 2-pack, or 3-pack quantity at checkout. This is ideal whether you need a single board for a project or want spares or multiple builds.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is this BMS board compatible with both LiFePO4 and standard lithium-ion (18650) batteries?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! This 4S BMS protection board supports both LiFePO4 cells (3.2V per cell, 12.8V pack) and standard lithium-ion cells (3.7V per cell, 14.4–14.8V pack), including popular formats like 18650 and 32650 cylindrical cells. Just ensure you select or configure the correct voltage thresholds for your cell chemistry.\"}}, {\"@type\": \"Question\", \"name\": \"What does the cell balancing feature do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Cell balancing ensures that all four cells in your series pack charge and discharge evenly. Over time, individual cells can drift apart in voltage, reducing overall pack capacity and potentially damaging weaker cells. 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This is ideal whether you need a single board for a project or want spares or multiple builds.\"}}]}\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:\/\/n8ande-60.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"4S 30A BMS LiFePO4 Lithium Battery Protection Board with Balance\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/products\/4s-30a-bms-lifepo4-lithium-battery-protection-board-with-balance\"}]}\u003c\/script\u003e","brand":"Axl","offers":[{"title":"Green 3.7V Lithium","offer_id":43692925124669,"sku":"14:1254#Green 3.7V Lithium","price":12.21,"currency_code":"USD","in_stock":true},{"title":"Blue 3.2V 3PCS","offer_id":43692925157437,"sku":"14:10#Blue 3.2V 3PCS","price":27.82,"currency_code":"USD","in_stock":true},{"title":"blue  3.2V LiFePO4","offer_id":43692925190205,"sku":"14:365458#blue  3.2V LiFePO4","price":12.21,"currency_code":"USD","in_stock":true},{"title":"Green 3.7V 3PCS","offer_id":43692925222973,"sku":"14:350852#Green 3.7V 3PCS","price":27.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0671\/3439\/0333\/files\/S01006d6c4c2942118c724b06571c7436x.webp?v=1790180479","url":"https:\/\/qtiply.com\/products\/4s-30a-bms-lifepo4-lithium-battery-protection-board-with-balance","provider":"QTP","version":"1.0","type":"link"}