{"product_id":"vapcell-n26-18500-2600mah-5a-imr-flat-top-high-capacity-18mm-x-50mm-li-ion-4-pack","title":"4-Pack Vapcell N26 18500 2600mAh 3.7V 5A CDR Flat Top Battery – High Capacity Short Cell for Specialty Flashlights, Headlamps \u0026 Electronics","description":"\u003ch4\u003e\u003cspan class=\"\"\u003eDescription\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003ePower your specialty-sized devices with the Vapcell N26, a high-capacity 18500 cell that delivers a full 2600mAh and a steady 5A continuous discharge. This 4-pack is the ideal power solution for short-body flashlights, compact headlamps, portable fans, electric toothbrushes, and medical devices designed for the 18500 form factor. At 50mm long—15mm shorter than an 18650—it fits perfectly in devices where a standard 18650 is too long, yet offers significantly more runtime than smaller 18350 cells. The flat top design ensures reliable contact with spring-loaded terminals. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eImportant:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e The 18500 is a distinct battery size. Always verify your device explicitly requires an 18500 cell before ordering—it will not fit in 18650 or 18350 compartments. With Vapcell's trusted quality and excellent cycle life, the N26 keeps your hard-to-fit devices running longer between charges.\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=\"\"\u003e2600mAh High Capacity\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Among the highest capacities available in the 18500 form factor. Provides approximately 30–70% more runtime than typical 1500–2000mAh 18500 cells, and rivals the capacity of many entry-level 18650s.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e5A Continuous Discharge (CDR)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Stable, reliable power for regulated LED flashlights, portable fans, electric toothbrushes, and similar medium-drain devices. Handles medium-high flashlight modes with ease.\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 – Compatible with devices featuring spring-loaded contacts. The flat positive terminal also simplifies spot-welding for custom battery 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=\"\"\u003e18500 Form Factor – The Sweet Spot\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Same diameter as an 18650 (18mm) but only \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e50mm long\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e—15mm shorter than a standard 18650 and 15mm longer than an 18350. Designed exclusively for devices that need more capacity than an 18350 but cannot fit a full-size 18650. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAlways verify your device's battery compartment length 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=\"\"\u003eIMR Chemistry\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Offers lower internal resistance and better thermal stability than standard LiCoO₂ cells, making it suitable for moderate high-drain 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=\"\"\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=\"\"\u003e4-Pack Convenience\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Perfect for powering multiple specialty flashlights, keeping spares for your headlamp and fan, or equipping a fleet of compact devices.\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 N26\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=\"\"\u003e18500 (18mm diameter × 50mm length)\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=\"\"\u003eIMR (Lithium Manganese Oxide \/ Hybrid, standard 3.6V\/3.7V)\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=\"\"\u003e2600 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~2500 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=\"\"\u003e5 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 8 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 (1300 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 (2600 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≤ 35 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. 18.3 mm diameter × 50.0 mm length (15mm shorter than 18650)\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. 38 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=\"\"\u003e4 × Vapcell N26 18500 flat top 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=\"\"\u003eSpecialty Short-Body Flashlights (18500 Compatible)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Certain compact EDC lights are designed specifically for 18500 cells to balance size and runtime. The 2600mAh capacity provides extended illumination in a still-compact form. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMust verify your flashlight uses 18500 cells.\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=\"\"\u003eCompact Headlamps\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Lighter than 18650-powered models, yet with significantly more capacity than 18350 alternatives. Ideal for extended outdoor activities where weight and runtime both matter.\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 Fans \u0026amp; Mini Cooling Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Certain compact fans accept 18500 cells. The 2600mAh capacity ensures longer cooling sessions between charges.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eElectric Toothbrushes (Select Models)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Some high-end rechargeable toothbrushes use 18500 cells. The N26 provides the longest runtime available in this form factor.\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 Medical Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Compact diagnostic tools, portable monitors, and infusion pumps that require reliable, long-lasting power in a shorter-than-18650 package.\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 Compact Battery Packs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Build custom power solutions where 18650 is too long but 18350 lacks sufficient capacity.\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 Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: The 18500 is 15mm shorter (50mm vs. 65mm) and will not make proper contact in devices designed for 18650 cells. Always check your device's battery compartment length.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e18350 Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: The 18500 is 15mm longer (50mm vs. 35mm) and will not fit in compartments designed for 18350 cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eStandard 1.5V AA Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: This is a 3.7V lithium-ion cell with an 18mm diameter—it is not compatible with AA devices in voltage or size.\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-Drain Devices (\u0026gt;5A Continuous)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: For FET-driven turbo flashlights or high-power vaping requiring sustained high current, use a dedicated high-drain 18650 or 21700 cell.\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: What is an 18500 battery? How is it different from an 18650?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: An 18500 cell has the same diameter as an 18650 (18mm) but is only \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e50mm long\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e, compared to the 65mm length of an 18650. It is essentially a shorter version, designed for devices with limited battery compartment space. The N26 offers 2600mAh—remarkably close to many 18650 cells—making it the ideal choice when you need solid runtime in a shorter form factor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Will this battery fit my 18650 flashlight or 18350 device?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNo.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e The 18500 is a distinct size. It is too short for 18650 compartments (50mm vs. 65mm) and too long for 18350 compartments (50mm vs. 35mm). It will only fit devices specifically designed for 18500 cells. Always 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 in my AA-powered device?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: No. This is an 18mm diameter, 3.7V lithium-ion cell. Standard AA devices are designed for 14mm diameter, 1.5V cells. The voltage and physical dimensions are both incompatible, and using this battery in an AA device will permanently damage the electronics.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: How does the N26 compare to the Vapcell M11 (18350) or F14 (18350)?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: The N26 is an \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e18500\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e cell, which is 15mm longer than an 18350. This extra length allows for significantly higher capacity—2600mAh vs. 1100–1400mAh in 18350 cells. If your device can fit the 50mm length, the N26 will provide nearly double the runtime.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Can I charge this battery with any lithium-ion charger?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes. The N26 uses standard lithium-ion charging (CC-CV to 4.2V). It is compatible with most quality lithium-ion chargers that accept cells up to 50mm in length. Charge at 0.5C (1300mA) for best longevity.\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":51454203461878,"sku":"OAS999","price":26.98,"currency_code":"USD","in_stock":true},{"title":"Button Top","offer_id":51454203494646,"sku":"OAS1000","price":27.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/vapcell-n26-4pack_01b6f7e9-7722-4f01-af2c-985eb46a114f.webp?v=1786967738","url":"https:\/\/oneandes.com\/products\/vapcell-n26-18500-2600mah-5a-imr-flat-top-high-capacity-18mm-x-50mm-li-ion-4-pack","provider":"OneAndes","version":"1.0","type":"link"}