{"product_id":"huxuan-15v-4s-2p-18650-li-ion-battery-pack-bms-power-wall","title":"HUXUAN 15V 4S 2P 18650 Li-Ion Battery Pack with BMS","description":"\n\u003ch2\u003eHUXUAN 15V 4S 2P 18650 Li-Ion Battery Pack with BMS — Built for Power Wall Projects\u003c\/h2\u003e\n\u003cp\u003ePower your next DIY energy storage build with the \u003cstrong\u003eHUXUAN 15V 4S 2P 18650 Lithium-Ion Battery Pack\u003c\/strong\u003e. Designed for makers, hobbyists, and electronics enthusiasts, this compact yet capable battery pack features a built-in \u003cstrong\u003eBattery Management System (BMS)\u003c\/strong\u003e that actively monitors and protects your cells — keeping your project running safely and efficiently.\u003c\/p\u003e\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 4S 2P (4 Series, 2 Parallel)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Voltage:\u003c\/strong\u003e 15V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Capacity:\u003c\/strong\u003e 700mAh\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Type:\u003c\/strong\u003e Li-Ion (18650)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic \u0026amp; PCB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSet Type:\u003c\/strong\u003e Batteries Only\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e 1 Pc\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCharging Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e35W charging requires a \u003cstrong\u003e12.6V charger\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e65W charging requires a \u003cstrong\u003e25.2V charger\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eRecommended maximum charging current per layer: \u003cstrong\u003e2A\u003c\/strong\u003e (e.g., 1 layer = 2A charger; 2 layers = 4A charger) to prevent overheating\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Safety Precautions\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDo \u003cstrong\u003enot\u003c\/strong\u003e use on a metal table — always ensure proper insulation to avoid short circuits\u003c\/li\u003e\n  \u003cli\u003eBatteries must face upward when viewing the circuit board; all batteries must face the \u003cstrong\u003esame direction\u003c\/strong\u003e and must not be crossed\u003c\/li\u003e\n  \u003cli\u003eDo \u003cstrong\u003enot\u003c\/strong\u003e connect the power supply with reversed polarity — check the markings on the circuit board carefully before connecting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEasy Installation\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eUpon receiving, install the batteries directly by referencing the orientation and polarity symbols on the circuit board\u003c\/li\u003e\n  \u003cli\u003eAlign the slots correctly, then secure the copper posts by screwing them in\u003c\/li\u003e\n  \u003cli\u003eVerify all copper posts are properly seated, then connect the ribbon cable\u003c\/li\u003e\n  \u003cli\u003eOnce the ribbon cable is connected, the pack is ready to use\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eWhy Choose This Battery Pack?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Built-in BMS for overcharge, over-discharge, and short-circuit protection\u003c\/li\u003e\n  \u003cli\u003e✅ Modular 4S 2P configuration — scalable for larger power wall builds\u003c\/li\u003e\n  \u003cli\u003e✅ Straightforward installation — no specialized tools required\u003c\/li\u003e\n  \u003cli\u003e✅ Clear PCB markings make polarity identification easy\u003c\/li\u003e\n  \u003cli\u003e✅ Compact form factor ideal for DIY energy storage projects\u003c\/li\u003e\n\u003c\/ul\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 Cabinet Lamp\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\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 charger do I need for this 15V 4S 2P 18650 battery pack?\u003c\/h4\u003e\n\u003cp\u003eA: The charger requirement depends on your desired charging wattage. For 35W charging, use a \u003cstrong\u003e12.6V charger\u003c\/strong\u003e. For 65W charging, use a \u003cstrong\u003e25.2V charger\u003c\/strong\u003e. Always ensure the charging current per layer does not exceed 2A to maintain safe operating temperatures.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the BMS (Battery Management System) included in this pack?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! This battery pack comes with a built-in BMS integrated into the PCB. The BMS provides essential protection functions including overcharge protection, over-discharge protection, and short-circuit protection, making it a safe choice for DIY power wall and energy storage projects.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I expand this battery pack for a larger power wall build?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, the modular 4S 2P configuration is designed to be scalable. When adding additional layers, remember to adjust your charging current accordingly (e.g., two layers = 4A charger maximum) to ensure safe and optimal charging performance.\u003c\/p\u003e\n\u003ch4\u003eQ: What surfaces are safe to use this battery pack on?\u003c\/h4\u003e\n\u003cp\u003eA: Always use this battery pack on a \u003cstrong\u003enon-metal, insulated surface\u003c\/strong\u003e. Using it on a metal table can create unintended electrical contact and risk a short circuit. Proper insulation is essential for safe operation.\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 charger do I need for this 15V 4S 2P 18650 battery pack?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The charger requirement depends on your desired charging wattage. For 35W charging, use a 12.6V charger. For 65W charging, use a 25.2V charger. Always ensure the charging current per layer does not exceed 2A to maintain safe operating temperatures.\"}}, {\"@type\": \"Question\", \"name\": \"Is the BMS (Battery Management System) included in this pack?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! This battery pack comes with a built-in BMS integrated into the PCB. 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