{"product_id":"2-pack-vapcell-k54-26650-5400mah-3-7v-nmc-15a-high-capacity-flat-top-rechargeable-battery","title":"2-Pack Vapcell K54 26650 5400mAh 15A CDR Flat Top Battery – High Capacity for Flashlights, Power Banks \u0026 Outdoor Audio","description":"\u003ch4\u003e\u003cspan class=\"\"\u003eDescription\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eGet extended runtime and reliable power in a robust 26650 form factor with the Vapcell K54. This 2-pack delivers a solid 5400mAh capacity and a steady 15A continuous discharge, making it an excellent power source for high-output 26650 LED flashlights, massive USB power banks, outdoor Bluetooth speakers, and medical devices. The 5400mAh capacity provides approximately 8% more runtime than a standard 5000mAh 21700 cell, ensuring extended operation between charges. The flat top design is ideal for spring-contact devices and spot-welding custom battery packs. The 26650 format is physically larger than 18650 and 21700 cells—please verify your device accepts 26650 before ordering. With excellent cycle life and Vapcell's trusted quality, the K54 keeps your power-hungry devices running longer.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eKey Features\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e5400mAh High Capacity\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Provides approximately 8% more runtime than a 5000mAh 21700 cell and about 54% more energy than a standard 3500mAh 18650. Ideal for applications where maximizing runtime between charges is the top priority.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e15A Continuous Discharge (CDR)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Stable, reliable power for high-output LED flashlights, fast-charging USB power banks, portable speakers, and similar medium-drain devices. Sufficient for turbo flashlight modes and 45W+ USB-C PD charging circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Perfect for devices with spring-loaded contacts and for spot-welding nickel strips into custom battery packs. Universally compatible with standard 26650 flat top chargers and battery trays.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eRobust 26650 Form Factor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Larger diameter (26.5mm) than 18650 (18mm) and 21700 (21mm). Offers higher capacity per cell and better heat dissipation. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAlways verify your device accepts 26650 before ordering.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eLong Cycle Life\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Retains over 80% of initial capacity after 500 charge\/discharge cycles under recommended conditions, reducing long-term replacement costs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2-Pack Convenience\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Build a 10800mAh power bank with two cells in parallel, power a flashlight and a speaker, or keep a charged spare ready for your high-drain device.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eParameters\u003c\/span\u003e\u003c\/h4\u003e\n\u003cdiv class=\"ds-scroll-area ds-scroll-area--show-on-focus-within ds-scroll-area--enabled _1210dd7 c03cafe9\"\u003e\n\u003cdiv class=\"ds-scroll-area__gutters\"\u003e\n\u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eParameter\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eVapcell K54\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eForm Factor\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e26650\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eChemistry\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eNMC (Lithium Nickel Manganese Cobalt, standard 3.6V)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eTypical Capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e5400 mAh (0.2C discharge to 2.5V)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMinimum Capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e~5200 mAh\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eNominal Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e3.6 V (typical operating 3.7 V)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge (CDR)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e15 A\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (cell temperature ≤ 75°C)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Pulse Discharge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eUp to 20–25 A (short burst only, monitor temperature; not for continuous use)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDischarge Cut-off Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e2.5 V (do not over-discharge)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eStandard Charge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCC-CV, 0.5C (2700 mA) to 4.2 V, cut-off 50 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Charge Current\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e1C (5400 mA); 0.5C recommended for best longevity\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eInternal Resistance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e≤ 20 mΩ (AC 1 kHz)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCycle Life\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e≥ 500 cycles (to 80% capacity, 0.5C charge \/ 1C discharge)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eOperating Temperature (Discharge)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e-20°C to 60°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eTop Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 26.5 mm diameter × 65.5 mm length\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eWeight (single cell)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 92 g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003ePackage Includes\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e2 × Vapcell K54 26650 cells in protective packaging\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eApplications\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eRecommended For\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eHigh-Output 26650 LED Flashlights \u0026amp; Searchlights\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: The 15A CDR handles turbo modes with ease, while the 5400mAh capacity provides hours of bright illumination. Perfect for search and rescue, security patrols, and outdoor adventures.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMassive-Capacity USB Power Banks\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Build a 10800mAh power bank with two cells in parallel. The 15A rating supports 45W–65W USB-C PD fast charging, enough to charge laptops and tablets.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePortable Bluetooth Speakers \u0026amp; Outdoor Audio\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: High-power speakers demand solid current for amplifiers. The K54 delivers clean power for distortion-free sound at high volumes, with the endurance for all-day music at festivals, camping, and beach outings.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMedical Devices \u0026amp; Portable Monitors\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Extended runtime and stable voltage output for critical equipment requiring uninterrupted, reliable power.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eOff-Grid Energy Storage \u0026amp; Solar Banks\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Low-current, long-duration energy storage with fewer cells needed than 21700 or 18650 packs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDIY High-Capacity Projects\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Robotics, backup power systems, and any project where maximum runtime in a manageable form factor is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNot Recommended For\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e18650 or 21700 Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: The 26650 has a larger diameter (26.5mm vs. 18mm\/21mm) and will not fit. Always check your device's battery compartment specifications before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eHigh-Power Vaping \/ Mechanical Mods\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Require 20–35A continuous discharge. The K54 is a high-capacity cell, not a high-drain cell. Use dedicated high-drain 18650\/21700 cells for vaping.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCordless Power Tools\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Typically require 20–40A continuous current. Use dedicated high-drain cells like the Vapcell P54 (20A) or D30 (55A) for power tool applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eRC Cars, Drones \u0026amp; Weight-Sensitive Applications\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: 26650 cells are heavier than 18650\/21700 alternatives.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eFAQ\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Is this a 26650 battery? Will it fit my 18650 or 21700 device?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes, the K54 is a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e26650\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e cell with a diameter of approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e26.5mm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. It will \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003enot\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e fit in devices designed for 18650 (18mm) or 21700 (21mm) cells. Only use this battery in devices specifically designed for the 26650 form factor. Please check your device's manual or measure the battery compartment before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Can I use this battery for vaping or power tools?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: No. Vaping devices require 20–35A continuous current and are typically designed for 18650 or 21700 cells. Power tools require 20–40A continuous. The K54's CDR is 15A. Using it in such devices will cause severe voltage sag, overheating, and potential damage. For these applications, use dedicated high-drain cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: What is the difference between the K54 and other Vapcell 26650 cells like the K62 or P54?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: The K54 offers \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e5400mAh with a 15A CDR\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e—a balanced all-around high-capacity cell. Compared to the K62 (6200mAh\/15A), the K54 has slightly less capacity but may be more affordable. Compared to the P54 (5400mAh\/20A), it offers the same capacity but a lower CDR. Choose the K54 for excellent all-around runtime at a great value.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Can I build a power bank with these?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: Absolutely. Two K54 cells in parallel provide approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e10800mAh\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e—enough to charge most smartphones over two times. The 15A per cell rating easily supports 45W–65W USB-C PD fast charging. With a quality power bank enclosure, this is an excellent compact high-capacity DIY power bank solution.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: How should I store these cells when not in use?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: Store at 3.6–3.7V (approximately 40–50% charge) in a cool, dry place. Use non-conductive battery cases to prevent accidental short circuits. Avoid storing fully charged or deeply discharged for extended periods.\u003c\/span\u003e\u003c\/p\u003e","brand":"Vapcell","offers":[{"title":"Flat Top","offer_id":51454199169270,"sku":"OAS953","price":17.98,"currency_code":"USD","in_stock":true},{"title":"Button Top","offer_id":51454199202038,"sku":"OAS954","price":17.98,"currency_code":"USD","in_stock":true},{"title":"Protected Top","offer_id":51454199234806,"sku":"OAS955","price":18.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/vapcell-k54-2pack-lifestyle-2_e0474b02-5192-4f6f-95d9-ea8440227b43.webp?v=1786967519","url":"https:\/\/oneandes.com\/products\/2-pack-vapcell-k54-26650-5400mah-3-7v-nmc-15a-high-capacity-flat-top-rechargeable-battery","provider":"OneAndes","version":"1.0","type":"link"}