{"title":"BAK 21700 Batteries","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eBAK 21700 cells are a builder's workhorse — dependable, established lithium-ion cells that cover everything from runtime-focused packs to tabless high-drain output.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eBAK is one of the longer-running names in cylindrical lithium-ion, with cells found across e-bikes, power tools, and energy storage worldwide. For a pack builder, that maturity translates to predictability: cells that behave consistently and deliver solid value rather than chasing headline numbers.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eStepping up from 18650, the BAK 21700 range gives you options at both ends — higher-capacity cells when runtime is the goal, and tabless high-drain cells when you need strong, sustained current. Either way you get the extra capacity and energy headroom the 21700 format brings over 18650.\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\"\u003eEstablished, proven cells from a long-standing manufacturer\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\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBoth high-capacity and tabless high-drain options available\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDependable, value-driven cells for serious builds\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\"\u003eE-bike and light EV battery packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePower-tool packs and high-drain rebuilds\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEnergy storage and portable power\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCustom 21700 pack assembly\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"bak-21700-5000mah-15a-battery-n21700cg","title":"BAK 21700 5000mAh 15A Battery (N21700CG)","description":"Sorry this item is no longer available.\r\n\u003cbr\u003e\u003ca title=\"Check out our selection of 21700 Batteries by clicking here.\" href=\"https:\/\/18650battery.com\/collections\/21700-batteries\" target=\"_blank\" rel=\"noopener\" aria-describedby=\"a11y-new-window-message\"\u003eCheck out our selection of 21700 Batteries by clicking here.\u003c\/a\u003e","brand":"BAK","offers":[{"title":"Default Title","offer_id":49286014173494,"sku":"BAK-21700-50","price":5.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0721\/2761\/1190\/files\/BAK-21700-50.jpg?v=1728074729"},{"product_id":"bak-45d-21700-4500mah-60a-battery","title":"BAK 45D 21700 4500mAh 60A Tabless Battery","description":"\u003ch4\u003eKey Features\u003c\/h4\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003eMassive 4500mAh Capacity:\u003c\/strong\u003e Built for long-lasting, high-power performance.\u003c\/li\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003e60A Max Output:\u003c\/strong\u003e Easily supports devices requiring extreme amperage.\u003c\/li\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Stability Chemistry:\u003c\/strong\u003e Maintains safe, efficient performance under heavy load.\u003c\/li\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003eLong Service Life:\u003c\/strong\u003e Over 600 charge cycles with minimal performance drop.\u003c\/li\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003eReliable 21700 Build:\u003c\/strong\u003e Larger cell design increases energy storage and output efficiency.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp\u003eWhen your projects demand uncompromising power, the BAK 45D delivers.  \r\nWith exceptional output capability and an impressive 4500mAh capacity, this battery ensures that high-drain devices operate at peak performance.  \r\nFrom e-bikes to power tools, the 45D excels in applications where both longevity and strength matter.  \r\nEngineered by BAK—an industry leader in lithium-ion innovation—this cell is built to outperform similar 21700 batteries in its class.\u003c\/p\u003e\r\n\r\n\u003ch4\u003eApplications\/Uses\u003c\/h4\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003eElectric Mobility:\u003c\/strong\u003e Perfect for EV packs, e-bikes, and scooters requiring sustained power.\u003c\/li\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Tools:\u003c\/strong\u003e Ideal for high-demand cordless tools and industrial equipment.\u003c\/li\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003eLarge Battery Packs:\u003c\/strong\u003e Commonly used in custom high-capacity lithium battery banks.\u003c\/li\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Drain Electronics:\u003c\/strong\u003e Suitable for demanding RC vehicles, drones, and field equipment.\u003c\/li\u003e\r\n  \u003cli\u003e\n\u003cstrong\u003eLighting Systems:\u003c\/strong\u003e Powers professional flashlights and tactical lighting at high output levels.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch4\u003eSPECIFICATIONS\u003c\/h4\u003e\r\n\u003cdiv class=\"table-wrapper\"\u003e\r\n\u003ctable\u003e\r\n\u003ctbody\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eBrand:\u003c\/td\u003e\n\u003ctd\u003eBAK\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eModel:\u003c\/td\u003e\n\u003ctd\u003e45D\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eBattery Type:\u003c\/td\u003e\n\u003ctd\u003e21700\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eCapacity:\u003c\/td\u003e\n\u003ctd\u003e4500mAh\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage:\u003c\/td\u003e\n\u003ctd\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eFull Charge Voltage:\u003c\/td\u003e\n\u003ctd\u003e4.2V\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eDischarge Cutoff Voltage:\u003c\/td\u003e\n\u003ctd\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eContinuous Discharge Rate:\u003c\/td\u003e\n\u003ctd\u003e60A (with 80°C cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eRechargeable:\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eProtected:\u003c\/td\u003e\n\u003ctd\u003eNo, Unprotected\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eCycle Life:\u003c\/td\u003e\n\u003ctd\u003e600+ cycles\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eDiameter:\u003c\/td\u003e\n\u003ctd\u003e21.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eLength:\u003c\/td\u003e\n\u003ctd\u003e70.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eWeight:\u003c\/td\u003e\n\u003ctd\u003e~70g\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003c\/tbody\u003e\r\n\u003c\/table\u003e\r\n\u003c\/div\u003e\r\n","brand":"BAK","offers":[{"title":"Default Title","offer_id":53494400155958,"sku":"BAK-45D","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0721\/2761\/1190\/files\/BAK-45D.jpg?v=1766082125"}],"url":"https:\/\/18650battery.com\/collections\/bak-21700-batteries.oembed","provider":"18650Battery","version":"1.0","type":"link"}