{"title":"Reliance 21700 Batteries","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eReliance 21700 cells are tabless, high-drain lithium-ion cells built to push real current in demanding pack builds.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe lineup — like the RS40 (4000mAh) and RS50 (5000mAh), both 70A-class — combines strong output with high capacity in the 21700 format. Their tabless design lowers internal resistance by connecting across the full electrode edge rather than through one tab, which means flatter voltage under load, less heat, and output that holds up through the discharge.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eFor builders working on drones, e-mobility, or other high-output projects, that mix of capacity and current makes Reliance a capable, high-performance choice in the 21700 format.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWhy builders choose them\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTabless design — low resistance, flat discharge, cooler under load\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e70A-class high-drain current capability\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHigh-capacity RS40 and RS50 options\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e21700 capacity and energy advantage over 18650\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eBuilt for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHigh-output drone and UAV packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eE-bike, e-scooter, and light EV builds\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHigh-drain RC and performance applications\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCustom 21700 pack assembly where current matters\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"reliance-rs50-21700-5000mah-70a-battery","title":"Reliance RS50 21700 5000mAh 70A Tabless Battery","description":"\u003ch4\u003eKey Features\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExtended Runtime:\u003c\/strong\u003e 5000mAh capacity supports longer operating cycles between charges.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExceptional Power Delivery:\u003c\/strong\u003e Up to 70A continuous discharge for high-demand applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStable INR Chemistry:\u003c\/strong\u003e Optimized for consistent output, safety, and thermal performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndustrial-Grade Construction:\u003c\/strong\u003e Steel shell with integrated pressure relief protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSystem Integration Ready:\u003c\/strong\u003e Ideal for professional battery packs and power systems.\u003c\/li\u003e \u003c\/ul\u003e \u003ch4\u003eOverview\u003c\/h4\u003e \u003cp\u003eThe Reliance RS50 is engineered to meet the needs of high-power applications requiring both capacity and reliability. Offering a robust 5000mAh nominal capacity and a 70A maximum continuous discharge rating, this 21700 lithium-ion battery delivers consistent performance under demanding conditions. Its rugged construction and optimized chemistry make it a dependable choice for professional and industrial power solutions.\u003c\/p\u003e \u003ch4\u003eApplications \/ Uses\u003c\/h4\u003e \u003cul\u003e \u003cli\u003eElectric mobility platforms\u003c\/li\u003e \u003cli\u003ePower tools and industrial machinery\u003c\/li\u003e \u003cli\u003eHigh-output battery pack systems\u003c\/li\u003e \u003cli\u003eCommercial and industrial electronics\u003c\/li\u003e \u003cli\u003eEnergy storage and power delivery solutions\u003c\/li\u003e \u003c\/ul\u003e \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eReliance\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRS50\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eBattery Size\u003c\/td\u003e\n\u003ctd\u003e21700\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003ePositive Terminal\u003c\/td\u003e\n\u003ctd\u003eFlat Top\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd\u003e4850mAh\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd\u003e70A\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003ePulse Discharge (5s)\u003c\/td\u003e\n\u003ctd\u003e140A\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eMaximum Voltage\u003c\/td\u003e\n\u003ctd\u003e4.2V\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eDischarge Cut-off Voltage\u003c\/td\u003e\n\u003ctd\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eNo (Unprotected)\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd\u003e2500mA\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eFast Charge Current\u003c\/td\u003e\n\u003ctd\u003e5000mA\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eCycle Life\u003c\/td\u003e\n\u003ctd\u003e≥80% capacity after 500 cycles\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-30°C to 75°C (Discharge) \/ 0°C to 60°C (Charge)\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eRechargeable\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eApprox. Dimensions\u003c\/td\u003e\n\u003ctd\u003e21.0mm x 70.2mm\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eApprox. Weight\u003c\/td\u003e\n\u003ctd\u003e66g\u003c\/td\u003e\n\u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0670\/0125\/3945\/files\/Reliance_21700_RS50_5000mAh_70A_Battery_Datasheet.pdf?v=1755714280\" target=\"_blank\" rel=\"noopener\"\u003eReliance 21700 RS50 5000mAh 70A Battery Datasheet\u003c\/a\u003e\u003c\/p\u003e","brand":"RELIANCE","offers":[{"title":"Default Title","offer_id":52932063985974,"sku":"RELIANCE-RS50","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0721\/2761\/1190\/files\/RELIANCE-RS50_3_24639f76-1e05-4877-8d7f-636e19007c40.jpg?v=1776369785"},{"product_id":"reliance-rs40-21700-4000mah-70a-battery","title":"Reliance RS40 21700 4000mAh 70A Tabless Battery","description":"\u003ch4\u003eKey Features\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExtended Runtime:\u003c\/strong\u003e 4000mAh capacity supports longer operating cycles.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExceptional Power Output:\u003c\/strong\u003e Up to 70A continuous discharge for demanding applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStable INR Chemistry:\u003c\/strong\u003e Designed for consistent output and thermal reliability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndustrial-Grade Build:\u003c\/strong\u003e Reinforced steel shell with integrated safety features.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSystem Integration Ready:\u003c\/strong\u003e Ideal for professionally engineered battery packs.\u003c\/li\u003e \u003c\/ul\u003e \u003ch4\u003eOverview\u003c\/h4\u003e \u003cp\u003eThe Reliance RS40 is engineered for applications where high current delivery and reliability are essential. Offering a 4000mAh nominal capacity and an industry-leading 70A continuous discharge rating, this 21700 lithium-ion cell is purpose-built for power-demanding systems. Its flat top, unprotected design allows seamless integration into advanced battery assemblies while maintaining consistent and dependable performance.\u003c\/p\u003e \u003ch4\u003eApplications \/ Uses\u003c\/h4\u003e \u003cul\u003e \u003cli\u003eElectric mobility platforms\u003c\/li\u003e \u003cli\u003ePower tools and industrial machinery\u003c\/li\u003e \u003cli\u003eHigh-output battery pack systems\u003c\/li\u003e \u003cli\u003eCommercial and industrial electronics\u003c\/li\u003e \u003cli\u003eEnergy storage and power delivery solutions\u003c\/li\u003e \u003c\/ul\u003e \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eReliance\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRS40\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eBattery Size\u003c\/td\u003e\n\u003ctd\u003e21700\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003ePositive Terminal\u003c\/td\u003e\n\u003ctd\u003eFlat Top\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd\u003e3900mAh\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd\u003e70A\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eMaximum Voltage\u003c\/td\u003e\n\u003ctd\u003e4.2V\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eDischarge Cut-off Voltage\u003c\/td\u003e\n\u003ctd\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eNo (Unprotected)\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd\u003e2500mA\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eCycle Life\u003c\/td\u003e\n\u003ctd\u003e≥80% capacity after 500 cycles\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20°C to 60°C (Discharge), 0°C to 45°C (Charge)\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eRechargeable\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eApprox. Dimensions\u003c\/td\u003e\n\u003ctd\u003e21.55mm x 70.3mm\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eApprox. Weight\u003c\/td\u003e\n\u003ctd\u003e65g\u003c\/td\u003e\n\u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0670\/0125\/3945\/files\/RELIANCE-RS40_Datasheet.pdf?v=1757089817\" target=\"_blank\" rel=\"noopener\"\u003eReliance RS40 21700 4000mAh 70A Battery Datasheet\u003c\/a\u003e\u003c\/p\u003e","brand":"RELIANCE","offers":[{"title":"Default Title","offer_id":52932086268214,"sku":"RELIANCE-RS40","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0721\/2761\/1190\/files\/RELIANCE-RS40_3_240ef485-5785-41e7-8554-0b5e58d4b7a9.jpg?v=1776370572"}],"url":"https:\/\/18650battery.com\/collections\/reliance-21700-batteries.oembed","provider":"18650Battery","version":"1.0","type":"link"}