{"product_id":"18650-battery-shell-21v-60a-30-cell-pcb-bms-protection-diy-power-tool","title":"18650 Battery Shell 21V 60A 30-Cell Box with PCB Protection","description":"\u003ch2\u003eHUXUAN 18650 Battery Shell — 21V 60A 30-Cell Box with PCB\/BMS Protection\u003c\/h2\u003e\n\u003cp\u003eBuild, repair, or upgrade your own battery packs with this robust \u003cstrong\u003e18650 battery shell enclosure\u003c\/strong\u003e from HUXUAN. Designed for experienced DIY builders and technicians, this 30-cell plastic and metal housing comes complete with a built-in \u003cstrong\u003ePCB\/BMS protection board\u003c\/strong\u003e rated at 21V and 60A — giving your custom battery pack the safety features it needs for power tools, electric vehicles, and portable energy storage projects.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Important:\u003c\/strong\u003e This product is a \u003cstrong\u003ecomponent only — batteries are NOT included\u003c\/strong\u003e. It is intended for individuals who are familiar with battery cell performance and have hands-on experience with battery pack assembly.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Protection Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eHigh \u0026amp; Low Temperature Protection\u003c\/strong\u003e — Safeguards cells during both charging and discharging cycles\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eExternally Adjustable Temperature Parameters\u003c\/strong\u003e — Fine-tune thresholds to match your specific cells\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eOvercharge Detection \u0026amp; Protection\u003c\/strong\u003e — Prevents cells from being charged beyond safe voltage limits\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eOverdischarge Detection \u0026amp; Protection\u003c\/strong\u003e — Keeps your cells within safe discharge range\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eThree-Stage Overcurrent Protection\u003c\/strong\u003e — Multi-layered current management for maximum safety\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eAdjustable Overcurrent Delay\u003c\/strong\u003e — First and second-stage delay timings can be configured externally\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eBattery Disconnection Protection\u003c\/strong\u003e — Detects and responds to open-circuit battery events\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eNTC Resistor Disconnection Protection\u003c\/strong\u003e — Guards the BMS against faulty temperature sensor connections\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eShort Circuit Protection\u003c\/strong\u003e — Instantly cuts output in the event of a short circuit\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCompatible with Mak Chargers\u003c\/strong\u003e — Plug-and-play charging compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e21V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e60A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCell Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 Cells (18650 format)\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\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14.0 × 7.5 × 10.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharger Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\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 × Battery Shell + PCB Protection Set\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAssembly \u0026amp; Safety Guidelines\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eDouble-check all battery lead and sampling point connections before powering on — reversed connections can damage the PCB.\u003c\/li\u003e\n  \u003cli\u003eThe BMS board must NOT directly contact the surface of any battery cell during assembly. Ensure all components are firmly secured.\u003c\/li\u003e\n  \u003cli\u003eAll welding\/soldering equipment must be properly grounded; use anti-static precautions to avoid damaging the protection board.\u003c\/li\u003e\n  \u003cli\u003eDo not allow lead wires or a soldering iron to contact board components during assembly — this can cause irreparable circuit damage.\u003c\/li\u003e\n  \u003cli\u003eKeep the assembled pack away from moisture and humidity; apply waterproofing measures where necessary.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eFirst Power-On Tip:\u003c\/strong\u003e If there is no voltage output on initial power-up after assembling your battery pack, use a dedicated compatible charger to activate the BMS. If the issue persists, please contact the seller.\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 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\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\"\u003eProfessional Heavy-Duty Pruning Shears\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: Are 18650 batteries included with this battery shell kit?\u003c\/h4\u003e\n\u003cp\u003eA: No, batteries are not included. This is a battery shell enclosure and PCB protection board (BMS) kit only. You will need to source and install 30 compatible 18650 lithium cells separately. This kit is designed for experienced DIY builders who are familiar with safe battery assembly practices.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of projects is this 21V 60A battery shell suitable for?\u003c\/h4\u003e\n\u003cp\u003eA: This battery shell is suitable for DIY power tool battery rebuilding, electric vehicle battery packs, portable energy storage solutions, and other projects requiring a 21V, 60A capable 30-cell 18650 format pack. It is also compatible with Mak brand chargers.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I adjust the protection settings on the PCB\/BMS board?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This BMS features externally adjustable temperature control parameters as well as adjustable overcurrent delay settings for the first and second protection stages, giving experienced builders greater flexibility to match the board's behavior to their specific cell type and application requirements.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What safety protections does the built-in BMS provide?\u003c\/h4\u003e\n\u003cp\u003eA: The integrated BMS offers comprehensive protection including overcharge detection, overdischarge detection, three-stage overcurrent protection, short circuit protection, high and low temperature protection, battery disconnection protection, and NTC resistor disconnection protection — covering the most critical failure scenarios in DIY lithium battery packs.\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\": \"Are 18650 batteries included with this battery shell kit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No, batteries are not included. This is a battery shell enclosure and PCB protection board (BMS) kit only. You will need to source and install 30 compatible 18650 lithium cells separately. 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