{"product_id":"4s-6a-active-balancer-board-lithium-battery-bms-lifepo4","title":"4S 6A Active Battery Balancer Board – Li-ion \u0026 LiFePO4 BMS","description":"\n\u003ch2\u003e4S 6A Active Energy Transfer Balancer Board – Capacitive Type for 4-String Lithium Battery Packs\u003c\/h2\u003e\n\u003cp\u003eKeep your lithium battery pack performing at its peak with this \u003cstrong\u003e4S 6A Active Balancer Board\u003c\/strong\u003e. Using capacitive energy-transfer technology, it automatically redistributes charge between cells in a 4-string configuration — helping extend overall battery cycle life and maintain consistent cell voltages across NCM and LiFePO4 chemistries.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDynamic Balancing Current:\u003c\/strong\u003e 0–6A, automatically adjusted based on the voltage differential between cells — no manual tuning required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Supports NCM and LiFePO4 lithium cell chemistries within a 2.5–4.5V operating voltage range.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacitive Energy Transfer:\u003c\/strong\u003e Efficiently shuttles energy from higher-voltage cells to lower-voltage cells, minimizing wasted heat compared to passive balancers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Idle Power Draw:\u003c\/strong\u003e Operating consumption of just 1.5mA–2.5mA keeps parasitic drain minimal when the pack is at rest.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact PCB Design:\u003c\/strong\u003e Measures only 45 × 36mm — easy to integrate into existing BMS setups without adding bulk.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Plastic + metal build for reliable long-term use in DIY battery packs, solar storage, e-bikes, and more.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfiguration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4S (4-string series)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Balancing Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6A (dynamic, voltage-differential driven)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5V – 4.5V per cell\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Chemistries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNCM, LiFePO4\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIdle Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5mA – 2.5mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 × 36mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlastic + Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × Active Balancer Board (PCB included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery \/ Charger Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\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\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e⚠️ Important Wiring Notice\u003c\/h3\u003e\n\u003cp\u003eCorrect wiring is essential. Incorrect connections may cause permanent damage to the board. Always double-check your wiring against the provided diagram before powering up. Wire length and voltage differential both influence balancing current — keep leads as short and equal in length as possible for optimal performance.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-2-inch-8-piece-hex-short-socket-set-vanadium-steel\"\u003e1\/2\" Drive 8-Piece Hex Short Socket Set – Vanadium Steel\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/hex-nut-bolt-extractor-tool-kit-10-piece\"\u003e10-Pc Hex Nut \u0026amp; Bolt Extractor Kit 9–19mm\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-piece-complete-gardening-tool-kit\"\u003e10-Piece Gardening Tool Kit – Iron Head \u0026amp; Plastic Handle\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 battery chemistries is this 4S active balancer board compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This 4S active balancer board supports both NCM (Nickel Cobalt Manganese) and LiFePO4 (Lithium Iron Phosphate) lithium cell chemistries, with an operating voltage range of 2.5V to 4.5V per cell — making it versatile for a wide range of DIY lithium battery pack builds.\u003c\/p\u003e\n\u003ch4\u003eQ: How does the active balancer differ from a passive balancer?\u003c\/h4\u003e\n\u003cp\u003eA: Unlike passive balancers, which dissipate excess cell energy as heat, this capacitive active balancer transfers energy from higher-voltage cells to lower-voltage cells. This means less wasted energy, less heat generation, and more efficient overall balancing — particularly valuable in higher-capacity battery packs.\u003c\/p\u003e\n\u003ch4\u003eQ: Does the balancing current need to be manually set?\u003c\/h4\u003e\n\u003cp\u003eA: No. The dynamic balancing current (0–6A) adjusts automatically based on the voltage differential between your cells. A larger voltage gap between cells results in a higher balancing current, while cells that are nearly equal in voltage will see minimal current flow. Note that wire length also influences the current, so keep your leads short and matched in length.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I use this board with my existing BMS?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This active balancer is designed to work alongside a standard BMS (Battery Management System) for 4-string lithium packs. It handles cell-level balancing while your BMS manages overcharge, over-discharge, and short-circuit protection. Ensure your wiring is correct before powering the system.\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 battery chemistries is this 4S active balancer board compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This 4S active balancer board supports both NCM (Nickel Cobalt Manganese) and LiFePO4 (Lithium Iron Phosphate) lithium cell chemistries, with an operating voltage range of 2.5V to 4.5V per cell — making it versatile for a wide range of DIY lithium battery pack builds.\"}}, {\"@type\": \"Question\", \"name\": \"How does the active balancer differ from a passive balancer?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Unlike passive balancers, which dissipate excess cell energy as heat, this capacitive active balancer transfers energy from higher-voltage cells to lower-voltage cells. This means less wasted energy, less heat generation, and more efficient overall balancing — particularly valuable in higher-capacity battery packs.\"}}, {\"@type\": \"Question\", \"name\": \"Does the balancing current need to be manually set?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. The dynamic balancing current (0–6A) adjusts automatically based on the voltage differential between your cells. A larger voltage gap between cells results in a higher balancing current, while cells that are nearly equal in voltage will see minimal current flow. Note that wire length also influences the current, so keep your leads short and matched in length.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use this board with my existing BMS?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. This active balancer is designed to work alongside a standard BMS (Battery Management System) for 4-string lithium packs. It handles cell-level balancing while your BMS manages overcharge, over-discharge, and short-circuit protection. Ensure your wiring is correct before powering the system.\"}}]}\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:\/\/rw8eae-v1.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Tools \u0026 Household\", \"item\": \"https:\/\/rw8eae-v1.myshopify.com\/collections\/tools-household\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"4S 6A Active Battery Balancer Board – Li-ion \u0026 LiFePO4 BMS\", \"item\": \"https:\/\/rw8eae-v1.myshopify.com\/products\/4s-6a-active-balancer-board-lithium-battery-bms-lifepo4\"}]}\u003c\/script\u003e","brand":"HIP","offers":[{"title":"one size","offer_id":46320258154730,"sku":"1005012839933097-one size","price":23.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0718\/4590\/4618\/files\/S88ad8c46bca640c4a94db73183d8cab42.webp?v=1790187747","url":"https:\/\/hipcustomerservice.com\/products\/4s-6a-active-balancer-board-lithium-battery-bms-lifepo4","provider":"HIP","version":"1.0","type":"link"}