{"product_id":"4s-6s-8s-3a-bms-lifepo4-lithium-battery-active-balancer-equalizer-3-2v-4-4v-battery-cell-packs-balance-energy-transfer-for-rv","title":"4S 6S 8S 3A BMS Lifepo4 Lithium Battery Active Balancer Equalizer 3.2V-4.4V Battery Cell Packs Balance Energy Transfer for RV","description":"\u003csection data-tufzen-geo-summary=\"v1\" class=\"tufzen-product-summary\"\u003e\u003ch2\u003eProduct Summary\u003c\/h2\u003e\n\u003cp\u003e4S 6S 8S 3A BMS Lifepo4 Lithium Battery Active Balancer Equalizer 3.2V-4.4V Battery Cell is a power and battery module selected for power conversion, battery testing, charging and regulated output projects. It is suitable for electronics builders, repair users and lab bench users who need practical electronics hardware for reliable project work.\u003c\/p\u003e\n\u003ch3\u003eBest For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003epower conversion, battery testing, charging and regulated output projects\u003c\/li\u003e\n\u003cli\u003eDIY electronics, battery packs, solar modules and bench power workflows\u003c\/li\u003e\n\u003cli\u003eElectronics testing, repair, prototyping and maker workflows\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWho is this product for?\u003c\/strong\u003e It is intended for electronics builders, repair users and lab bench users.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat should I check before buying?\u003c\/strong\u003e Review the product options, specifications, included accessories and compatibility details on this page.\u003c\/p\u003e\u003c\/section\u003e\u003cdiv class=\"detailmodule_dynamic\"\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(244, 78, 59); font-size: 18px;\"\u003e\u003cstrong\u003eTo ensure safety, lithium battery related operations require corresponding knowledge and operation skills. If you do not have this knowledge and skills, please do not purchase.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eSuitable battery type: 3.2V-4.4V (lithium iron phosphate\/ternary lithium, etc., no manual switching is required) \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eMaximum balancing current: 3A (when the voltage difference is 1.2V) \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eBalance voltage accuracy: 0.01V \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eSuitable ambient temperature: -15 degrees Celsius-75 degrees Celsius \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eBalance start condition: Always balance when powered on, the greater the voltage difference, the greater the balancing current \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eBalance method principle: overall capacitor energy transfer balance \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eStatic current loss: about 2-6mA (slightly different from 4S-8S) \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eBattery low voltage protection: automatically turn off the balance protection when the single cell is lower than 2.5V \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eBattery external balance switch: can be external (generally not required) \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eMatching plug wire: VH3.96@20AWG 35CM \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eMain body appearance size: (4S 50mm*38mm), (6S 50mm*54mm), (8S 50mm*67mm)\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(244, 78, 59); font-size: 16px;\"\u003e\u003cspan style=\"color: rgb(244, 78, 59); font-size: 18px;\"\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eBattery packs within 2Ah-400Ah can be used, but the larger the capacity, the longer the balancing time\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eThe balancing board reserves an external switch pad. When an external switch is needed, first cut off the connecting copper foil between the two pads, and then connect an external switch to realize the on-off control of the circuit (because the overall power consumption of the circuit is not much. Generally, an external switch is not required)\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eSeries application logic: number of batteries = N+(N-1), that is: 4S+(4S-1)=7 strings; 4S+(6S-1)=9 strings; 8S+(8S-1)=15 strings\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eBO is the total negative forward connection, wrong sequence or reverse connection short circuit will burn, the balancing current size is related to the battery voltage difference, wire internal resistance, and battery internal resistance (the larger the battery voltage difference, the larger the balancing current, the smaller the wire and battery internal resistance, the larger the balancing current, and vice versa)\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eMultiple parallel connections can increase the current, and multiple series connections can increase the number of strings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 16px;\"\u003eIt is recommended to record the voltage of each battery before use, and record the voltage again after 1-3 days of use for comparison.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/S1fb1adb6fce24ff2b781b28b38e5c9f2x.webp?v=1770024818\" alt=\"\" loading=\"lazy\" decoding=\"async\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/S48c9c206917642a0ae6beec64594c567T.webp?v=1770024818\" alt=\"\" loading=\"lazy\" decoding=\"async\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/S0d992d8190ee44deb395590a1946a25dR.webp?v=1770024818\" alt=\"\" loading=\"lazy\" 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