{"product_id":"samsung-inr21700-40t-4000mah-35a-li-ion-battery-for-power-tools-e-bikes-diy-battery-packs-1-100-pcs","title":"Samsung INR21700-40T 4000mAh 35A Li-ion Battery for Power Tools, E-Bikes \u0026 DIY Battery Packs (1-100 PCS)","description":"\u003cdiv style=\"border-left:3px solid #d9d9d9;padding:14px 18px;margin-bottom:22px;\"\u003e\n\u003cp style=\"margin:0 0 12px;font-size:18px;font-weight:700;color:#1b16d8;\"\u003e🌐 Global Shipping from China – Rates \u0026amp; Delivery Times\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003ca href=\"https:\/\/dxf-hobby.store\/pages\/china-warehouse-shipping\" target=\"_blank\" rel=\"noopener\" style=\"color:#d64224;text-decoration:underline;\"\u003ehttps:\/\/dxf-hobby.store\/pages\/china-warehouse-shipping\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eChoose your pack quantity (1–100 PCS) — genuine Samsung INR21700-40T ultra-high drain lithium-ion cells for your power tools, electric mobility, and custom DIY battery projects.\u003c\/p\u003e\n\u003c\/div\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0484\/7691\/3827\/files\/dxf_552c7b88-2609-4f84-bed1-943e60c00cc8.png?v=1764311930\" alt=\"DXF global warehouse delivery network\" style=\"width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eSamsung INR21700-40T 4000mAh 35A Continuous Discharge Li-ion Rechargeable Battery\u003c\/strong\u003e (40T \/ 40T5) is an elite high-drain 21700 cylindrical power cell engineered for demanding high-current applications. Manufactured by Samsung SDI and supplied by DXF POWER with strict quality grading, this flat-top unprotected cell delivers a minimum 4000mAh standard capacity at 3.6V nominal platform (4.20V max charge) with an impressive 35A continuous discharge rating without temperature cut (up to 45A with an 80°C thermal cut-off). It is the premier choice for high-draw cordless power tools, electric skateboards, e-bikes, scooters, high-lumen flashlights, and custom multi-cell DIY battery packs requiring massive current delivery and robust cycle life.\u003c\/p\u003e\u003ch2\u003eWatch DXF Batteries in Action\u003c\/h2\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/9yfcgnfSTk0\" title=\"Watch DXF Batteries in Action\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Samsung SDI 40T Cell:\u003c\/strong\u003e Authentic Grade-A 21700 cylindrical cell (40T \/ 40T5) renowned for low internal resistance and massive continuous power delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e35A Continuous Discharge Rating:\u003c\/strong\u003e Delivers true 35A continuous discharge without temperature cutoff (and up to 45A with 80°C surface thermal control)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4000mAh High Capacity:\u003c\/strong\u003e Minimum 4000mAh standard discharge capacity (at 0.2C \/ 800mA) and minimum 3900mAh rated capacity at 10A discharge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Rated Charging:\u003c\/strong\u003e Supports 2A standard charge (approx. 180 mins) and rapid 6A rated charging (approx. 70 mins to full charge)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Cycle Life \u0026amp; Storage Recovery:\u003c\/strong\u003e Retains ≥2400mAh after 250 harsh cycles (6A charge \/ 35A discharge at 25°C), and ≥3510mAh recovery after 30 days storage at 60°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 21700 Flat-Top Design:\u003c\/strong\u003e Dimensions (21.22mm max diameter × 70.30mm max height) with flat top terminal, ideal for spot-welded packs and modular battery sleds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple Pack Bundles:\u003c\/strong\u003e Available in 1, 10, 20, 50, and 100 piece packages to suit single replacements or bulk pack fabrication\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications, Per Battery\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Manufacturer:\u003c\/strong\u003e Samsung SDI (Supplied by DXF POWER)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel \/ Variant:\u003c\/strong\u003e INR21700-40T (40T \/ 40T5)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell Type:\u003c\/strong\u003e 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Terminal \/ Form Factor:\u003c\/strong\u003e Flat Top (Unprotected industrial cell)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Discharge Capacity:\u003c\/strong\u003e Minimum 4000mAh (at 0.2C \/ 800mA discharge to 2.5V)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Discharge Capacity:\u003c\/strong\u003e Minimum 3900mAh (at 10A discharge to 2.5V)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Voltage:\u003c\/strong\u003e 3.6V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge Cut-Off Voltage:\u003c\/strong\u003e 4.20V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge Cut-Off Voltage:\u003c\/strong\u003e 2.50V (end-of-discharge)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Discharge Current:\u003c\/strong\u003e 35A (without temperature cut, recommended headline rating); 45A with 80°C surface thermal control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Charge:\u003c\/strong\u003e CC-CV, 2A, 4.20V, 200mA cut-off (approx. 180 minutes)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Fast Charge:\u003c\/strong\u003e CC-CV, 6A, 4.20V, 100mA cut-off (approx. 70 minutes)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCycle-Life Criterion:\u003c\/strong\u003e ≥2400mAh after 250 cycles (6A charge, 35A discharge to 2.5V at 25°C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Recovery:\u003c\/strong\u003e ≥3510mAh after 30 days at 60°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Operating Temperature:\u003c\/strong\u003e Charge: 0°C to 45°C \/ Discharge: -20°C to 60°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Temperature Limits:\u003c\/strong\u003e Charge: 0°C to 50°C \/ Discharge: -20°C to 80°C (recommended re-discharge release \u0026lt;60°C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 21.22mm max diameter × 70.30mm max height (with tube)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 70.0g max (approx. 67g nominal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e No integrated protection circuit (requires device-level or pack BMS protection)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Cordless power tools, electric bicycles, e-scooters, electric skateboards, high-output flashlights, robotics, and custom DIY battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSamsung INR21700-40T 4000mAh 35A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS\u003c\/li\u003e\n\u003cli\u003eProtective packaging \/ cell box\u003c\/li\u003e\n\u003cli\u003eUser manual and battery safety guide\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eChoose Your Ideal Power Bundle\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 PCS – Quick Replacement \u0026amp; Testing:\u003c\/strong\u003e Single cell for flashlight upgrade, tool testing, or individual cell repair\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10 PCS – Tool Pack Rebuilds:\u003c\/strong\u003e Perfect for rebuilding heavy-duty cordless power tool battery packs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 PCS – High-Output Modules:\u003c\/strong\u003e Ideal for 36V or 48V auxiliary modules, robotics, and DIY power packs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50 PCS – Mobility \u0026amp; Energy Modules:\u003c\/strong\u003e Tailored for high-performance electric bike packs, e-scooters, and portable power stations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 PCS – Master Builder Bulk Set:\u003c\/strong\u003e Best value for workshops, custom pack assemblers, and volume battery builders\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003ePurchasing in bundles ensures matched cell batches for balanced series and parallel assembly.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003e180-Day Warranty \u0026amp; Customer Support\u003c\/h2\u003e\u003cp\u003eEvery cell batch supplied by DXF POWER is covered by a \u003cstrong\u003e180-day manufacturer warranty\u003c\/strong\u003e against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.\u003c\/p\u003e\u003ch2\u003eUsage \u0026amp; Safety Guidelines\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eUse a dedicated lithium-ion smart charger supporting CC\/CV charging mode.\u003c\/li\u003e\n\u003cli\u003eNever charge above 4.20V per cell or discharge below 2.50V per cell.\u003c\/li\u003e\n\u003cli\u003eDo not exceed cell surface temperature of 50°C during charging and 80°C during discharge; allow cell to cool below 60°C before recharging.\u003c\/li\u003e\n\u003cli\u003eAlways inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.\u003c\/li\u003e\n\u003cli\u003eNever carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; always store in an insulated battery case.\u003c\/li\u003e\n\u003cli\u003eDo not short-circuit, crush, incinerate, puncture, or submerge cells in water.\u003c\/li\u003e\n\u003cli\u003eStore batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.\u003c\/li\u003e\n\u003cli\u003eWhen building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Choose DXF?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGenuine Grade-A Samsung SDI 40T cells with true 4000mAh capacity and tested 35A high-drain output\u003c\/li\u003e\n\u003cli\u003eReliable 35A continuous discharge rating under demanding industrial operational loads\u003c\/li\u003e\n\u003cli\u003eCarefully matched batches for balanced series and parallel pack assembly\u003c\/li\u003e\n\u003cli\u003eStrict factory pre-shipment quality checks and secure protective packaging\u003c\/li\u003e\n\u003cli\u003eGlobal warehouse logistics network and professional technical customer support\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePerfect For\u003c\/h2\u003e\u003cp\u003eEngineered for contractors, e-mobility builders, DIY pack fabricators, and enthusiasts demanding class-leading 35A continuous output and 4000mAh capacity for high-drain cordless tools, electric transport, robotics, and custom energy modules.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003ePower your projects with trusted Samsung 21700 performance.\u003c\/strong\u003e Learn more about setups and battery care on the \u003ca href=\"https:\/\/www.youtube.com\/@stevehou8316\" target=\"_blank\" rel=\"noopener\"\u003eDXF YouTube channel\u003c\/a\u003e.\u003c\/p\u003e","brand":"DXF POWER","offers":[{"title":"1PCS New Samsung  INR2170040T 21700 3.6V 4000mAh BATTERY","offer_id":46147624665251,"sku":"INR21700-40T-4000mAh-1PCS","price":22.42,"currency_code":"USD","in_stock":true},{"title":"10PCS New Samsung  INR2170040T 21700 3.6V 4000mAh BATTERY","offer_id":46147624698019,"sku":"INR21700-40T-4000mAh-10PCS","price":58.22,"currency_code":"USD","in_stock":true},{"title":"20PCS New Samsung  INR2170040T 21700 3.6V 4000mAh BATTERY","offer_id":46147624730787,"sku":"INR21700-40T-4000mAh-20PCS","price":104.76,"currency_code":"USD","in_stock":true},{"title":"50PCS New Samsung  INR2170040T 21700 3.6V 4000mAh BATTERY","offer_id":46147624763555,"sku":"INR21700-40T-4000mAh-50PCS","price":244.38,"currency_code":"USD","in_stock":true},{"title":"100PCS New Samsung  INR2170040T 21700 3.6V 4000mAh BATTERY","offer_id":46147624796323,"sku":"INR21700-40T-4000mAh-100PCS","price":477.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0484\/7691\/3827\/files\/5_5b43a872-fe3d-44b9-bcbc-c078f4a2e5d6.png?v=1790599159","url":"https:\/\/dxf-hobby.store\/da-es\/products\/samsung-inr21700-40t-4000mah-35a-li-ion-battery-for-power-tools-e-bikes-diy-battery-packs-1-100-pcs","provider":"DXF POWER","version":"1.0","type":"link"}