{"product_id":"21v-15-cell-18650-li-ion-battery-case-shell-kit-diy-pack","title":"21V 15-Cell 18650 Li-Ion Battery Case Shell Kit – DIY Pack","description":"\n\u003ch2\u003e21V 15-Cell 18650 Lithium Battery Shell Kit – DIY Battery Pack Accessories\u003c\/h2\u003e\n\u003cp\u003eBuild or restore your own 21V battery pack with this versatile \u003cstrong\u003e15-cell 18650 Li-Ion Battery Case Kit\u003c\/strong\u003e. Designed for hobbyists, technicians, and electronics enthusiasts who are experienced in battery assembly, this durable plastic and metal shell kit provides everything you need to house and organize 18650 cells into a compact, reliable battery pack — no cells included.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Note:\u003c\/strong\u003e This product is a battery case\/shell component only. It does \u003cem\u003enot\u003c\/em\u003e include battery cells. It is intended for use by individuals with practical experience and knowledge in battery assembly and performance.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFits 15 × 18650 Cells\u003c\/strong\u003e – Supports a 21V nominal output configuration (5S3P or similar layout)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction\u003c\/strong\u003e – Made from high-quality plastic and metal components for long-lasting use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor\u003c\/strong\u003e – Dimensions: 4.53 × 2.87 × 3.15 in (11.5 × 7.3 × 8.0 cm) — easy to integrate into DIY power tool or e-bike projects\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColour: Black\u003c\/strong\u003e – Clean, professional-looking finish\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRepair \u0026amp; Rebuild Friendly\u003c\/strong\u003e – Ideal for repairing existing battery packs or assembling new custom power solutions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLi-Ion Compatible\u003c\/strong\u003e – Designed specifically for standard 18650 lithium-ion cells\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eLi-Ion Battery Shell Kit (No Cells Included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCell Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1400mAh (per cell, cells not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e21V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCell Slots\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e15 Cells\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003ePlastic + Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e4.53 × 2.87 × 3.15 in \/ 11.5 × 7.3 × 8.0 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eColour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackage Includes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1 × Battery Shell Kit Set\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWho Is This For?\u003c\/h3\u003e\n\u003cp\u003eThis kit is perfect for experienced DIYers, electronics technicians, and makers who need a reliable housing solution for custom 18650 battery pack builds. Whether you're restoring a power tool battery, building a custom e-bike pack, or prototyping a portable power supply, this shell kit gives you a solid foundation to work with.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-wooden-handle-nylon-bristle-paint-brush-for-oil-painting-dusting-and-cleaning-unrechargeable-hand-tool-set-without-batt-2\"\u003e10Pcs Wooden Handle Nylon Bristle Paint Brush – Hand Tool Set\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  \u003cli\u003e\u003ca href=\"\/products\/1pc-professional-heavy-duty-pruning-shears-with-anti-slip-handle-design-suitable-for-trimming-thick-and-sturdy-branches\"\u003e1pc Professional Heavy-Duty Pruning Shears with Anti-Slip 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: Does this 21V 18650 battery case kit come with battery cells included?\u003c\/h4\u003e\n\u003cp\u003eA: No, this kit is a battery shell\/case component only and does \u003cstrong\u003enot\u003c\/strong\u003e include 18650 lithium-ion cells. You will need to source and install compatible 18650 cells separately. It is designed for users who already have experience handling and assembling lithium battery packs.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What size 18650 cells does this battery case fit?\u003c\/h4\u003e\n\u003cp\u003eA: This battery shell kit is designed to accommodate standard 18650 lithium-ion cells across 15 slots, configured for a 21V output pack. Always ensure the cells you use are rated appropriately for your intended application before assembly.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this 18650 battery pack kit suitable for beginners?\u003c\/h4\u003e\n\u003cp\u003eA: This kit is recommended only for individuals who are already familiar with lithium-ion battery performance, cell handling safety, and have practical hands-on experience in battery assembly. If you are new to battery building, please seek guidance from an experienced professional before attempting assembly.\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\": \"Does this 21V 18650 battery case kit come with battery cells included?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No, this kit is a battery shell\/case component only and does not include 18650 lithium-ion cells. You will need to source and install compatible 18650 cells separately. 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