{"product_id":"2s-3s-4s-active-battery-balancer-board-1-2a-inductive-equalizer-module","title":"2S 3S 4S Active Battery Balancer 1.2A Inductive Equalizer Module","description":"\n\u003ch2\u003e2S \/ 3S \/ 4S Active Battery Balancer Board – 1.2A Inductive Energy Transfer Equalizer\u003c\/h2\u003e\n\u003cp\u003eKeep your lithium battery pack performing at its peak with the \u003cstrong\u003eKOQZM 2S\/3S\/4S Active Balancer Board\u003c\/strong\u003e. Using inductive energy transfer technology, this module automatically detects voltage differences between adjacent cells and redistributes energy to equalize them — extending the life of your battery pack and maximising overall efficiency. Compatible with LiFePO4, LiPo, and Li-ion ternary lithium batteries.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eThis board operates on the principle of \u003cstrong\u003eadjacent cell equalization\u003c\/strong\u003e. When the voltage difference between two neighbouring cells exceeds \u003cstrong\u003e0.1V\u003c\/strong\u003e, the onboard chip automatically triggers balancing. It continues transferring energy between cells until the voltage difference drops to within \u003cstrong\u003e0.03V\u003c\/strong\u003e, then enters sleep mode. No manual intervention required — it works seamlessly during both charging and discharging cycles.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eTrigger threshold:\u003c\/strong\u003e Voltage difference \u0026gt; 0.1V → balancing current ~0.5–0.7A\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eMaximum balance current:\u003c\/strong\u003e 1.2A (when voltage difference \u0026gt; 0.2V)\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eStop threshold:\u003c\/strong\u003e Voltage difference ≤ 0.03V (enters sleep mode)\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eWorking voltage range:\u003c\/strong\u003e 2.0V – 4.5V per cell\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCompatible with:\u003c\/strong\u003e 2S, 3S, or 4S lithium battery packs (LiFePO4, LiPo, Li-ion ternary)\u003c\/li\u003e\n  \u003cli\u003e⚠️ \u003cstrong\u003eNOT compatible with LTO (Lithium Titanate) batteries\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLED Status Indicators\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003cth style=\"border:1px solid #ddd;padding:8px;\"\u003eLED Status\u003c\/th\u003e\n    \u003cth style=\"border:1px solid #ddd;padding:8px;\"\u003eMeaning\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e🟢 Solid ON\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eEqualization actively in progress\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e⚫ OFF\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eEqualizer in sleep mode (cells balanced)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e🔵 Flashing\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eCell string issue detected or circuit fault\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWiring Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB−\u003c\/strong\u003e: Total negative pole of the battery pack (negative of Cell 1)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB1\u003c\/strong\u003e: Positive pole of Cell 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB2\u003c\/strong\u003e: Positive pole of Cell 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB3\u003c\/strong\u003e: Positive pole of Cell 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB4\u003c\/strong\u003e: Positive pole of Cell 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e⚠️ \u003cstrong\u003eImportant:\u003c\/strong\u003e For configurations of 13S or more, the cable plug must be inserted at an angle — make contact with the B− pin first, then insert upward at an angle. Failure to do so may damage the board.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KOQZM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 2S \/ 3S \/ 4S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBalance Current:\u003c\/strong\u003e Up to 1.2A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Voltage:\u003c\/strong\u003e 2.0V – 4.5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Types:\u003c\/strong\u003e LiFePO4, LiPo, Li-ion (ternary)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEqualization Principle:\u003c\/strong\u003e Inductive adjacent cell energy transfer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Precautions\u003c\/h3\u003e\n\u003cp\u003eThis board is \u003cstrong\u003enot a standalone battery maintenance tool\u003c\/strong\u003e. It must always be used in conjunction with a compatible lithium battery protection board (BMS). The equalizer is triggered by the voltage differences generated during normal charge and discharge cycles — it is designed for ongoing cell balancing within a battery pack, not for recovery of deeply discharged cells.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Also Need\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-25mm-1000-turn-precision-copper-inductor-coil-diy-electronics\"\u003e0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler\"\u003e1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor further reading on lithium battery safety and best practices, refer to the U.S. Consumer Product Safety Commission – Lithium Battery Safety Information.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What types of lithium batteries are compatible with this active balancer board?\u003c\/h4\u003e\n\u003cp\u003eA: This 2S\/3S\/4S active balancer board is compatible with LiFePO4, LiPo, and Li-ion ternary lithium batteries with a working voltage range of 2.0V–4.5V per cell. It is \u003cstrong\u003enot compatible\u003c\/strong\u003e with LTO (Lithium Titanate Oxide) batteries.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this balancer board replace a BMS (Battery Management System)?\u003c\/h4\u003e\n\u003cp\u003eA: No. This board is designed to work \u003cem\u003ealongside\u003c\/em\u003e a lithium battery protection board (BMS), not as a replacement. The BMS handles overcharge, over-discharge, and short-circuit protection, while this equalizer focuses on balancing the voltage across adjacent cells during charge and discharge cycles.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I know when the balancer is actively equalizing?\u003c\/h4\u003e\n\u003cp\u003eA: The onboard LED indicator tells you everything — a solid light means equalization is in progress, no light means the cells are balanced and the board is in sleep mode, and a flashing light indicates a potential string drop or circuit fault that should be investigated.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum balancing current this module can deliver?\u003c\/h4\u003e\n\u003cp\u003eA: When the adjacent cell voltage difference exceeds 0.2V, this module delivers a maximum balancing current of \u003cstrong\u003e1.2A\u003c\/strong\u003e. At smaller differences (above 0.1V), the current is approximately 0.5–0.7A and decreases proportionally as the cells approach equilibrium.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What types of lithium batteries are compatible with this active balancer board?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This 2S\/3S\/4S active balancer board is compatible with LiFePO4, LiPo, and Li-ion ternary lithium batteries with a working voltage range of 2.0V–4.5V per cell. It is not compatible with LTO (Lithium Titanate Oxide) batteries.\"}}, {\"@type\": \"Question\", \"name\": \"Does this balancer board replace a BMS (Battery Management System)?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. This board is designed to work alongside a lithium battery protection board (BMS), not as a replacement. 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At smaller differences (above 0.1V), the current is approximately 0.5–0.7A and decreases proportionally as the cells approach equilibrium.\"}}]}\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:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"2S 3S 4S Active Battery Balancer 1.2A Inductive Equalizer Module\", \"item\": \"https:\/\/oasis-select.com\/products\/2s-3s-4s-active-battery-balancer-board-1-2a-inductive-equalizer-module\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"3S","offer_id":47751486931049,"sku":"14:350853#3S","price":12.7,"currency_code":"USD","in_stock":true},{"title":"2S","offer_id":47751486963817,"sku":"14:200004891#2S","price":12.7,"currency_code":"USD","in_stock":true},{"title":"4S","offer_id":47751486996585,"sku":"14:10#4S","price":12.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S0fa1aebf95064a4eacabaf9a58acdb93m.webp?v=1783193430","url":"https:\/\/oasis-select.com\/products\/2s-3s-4s-active-battery-balancer-board-1-2a-inductive-equalizer-module","provider":"Oasis Select","version":"1.0","type":"link"}