{"product_id":"joinsun-18650-2500mah-3-6v-20a-li-ion-rechargeable-battery","title":"18650 2500mAh 3.6V 20A Li-Ion Rechargeable Battery (Replaces 25R \u0026 30Q)","description":"\u003ch1\u003eJOINSUN INR18650 18650 Battery — 2500mAh 3.6V 20A Li-Ion Rechargeable Cell Replaces Samsung 25R and Samsung 30Q\u003c\/h1\u003e\n\u003ch3\u003eReliable 18650 Lithium-Ion Cell for Battery Packs and Everyday High-Drain Use\u003c\/h3\u003e\n\u003cp\u003eThe JOINSUN INR18650 is a 3.6V lithium-ion rechargeable battery cell built for applications that need a dependable mix of capacity, current capability, and long cycle life in the standard 18650 form factor.\u003c\/p\u003e\n\u003cp\u003eWith a rated capacity of 2500mAh and a maximum discharge rate of 8C (approximately 20A), this cell is well suited for battery pack building, power tools, portable power equipment, flashlights, and other electronics that draw moderate to high current.\u003c\/p\u003e\n\u003cp\u003eRated for up to 1000 cycles under the manufacturer's test conditions, the JOINSUN 2500mAh cell is a cost-effective option when you need consistent performance across many charge cycles.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⚡ JOINSUN 18650 2500mAh — Built for Everyday Power\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eKey Advantages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2500mAh rated capacity\u003c\/li\u003e\n\u003cli\u003e8C maximum discharge rate (~20A)*\u003c\/li\u003e\n\u003cli\u003e3.6V nominal voltage\u003c\/li\u003e\n\u003cli\u003eLithium-ion rechargeable chemistry\u003c\/li\u003e\n\u003cli\u003eRated up to 1000 cycles*\u003c\/li\u003e\n\u003cli\u003eCompact 18650 cylindrical format\u003c\/li\u003e\n\u003cli\u003eSuitable for pack-building and high-drain applications\u003c\/li\u003e\n\u003cli\u003eGreat value for bulk and repeat-purchase projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Discharge and cycle-life ratings depend on operating conditions, temperature, charge\/discharge rates, and cutoff parameters. Always design the battery pack around the manufacturer's current, temperature, charging, and safety requirements.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔋 JOINSUN 18650 2500mAh Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eJOINSUN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eJS-INR18650-25R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Type\u003c\/td\u003e\n\u003ctd\u003eLithium-Ion Rechargeable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003e18650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd\u003e2500mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Discharge Rate\u003c\/td\u003e\n\u003ctd\u003e8C (~20A)*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Charge Rate\u003c\/td\u003e\n\u003ctd\u003e1C (2.5A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCycle Life (80% DOD, 25℃)\u003c\/td\u003e\n\u003ctd\u003e≥600 cycles (0.5C charge \/ 5C discharge)\u003cbr\u003e≥1000 cycles (1C charge \/ discharge to 3V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharge Temperature (cell surface)\u003c\/td\u003e\n\u003ctd\u003e0℃ to 45℃\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDischarge Temperature (cell surface)\u003c\/td\u003e\n\u003ctd\u003e-10℃ to 60℃\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApprox. Dimensions (H x D)\u003c\/td\u003e\n\u003ctd\u003e2.56\" x 0.72\" (approx. 65mm x 18.3mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApprox. Weight\u003c\/td\u003e\n\u003ctd\u003e0.1 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is an unprotected bare cell. There is no built-in PCB, BMS, over-charge protection, over-discharge protection, or short-circuit protection.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔄 Long Cycle Life\u003c\/h2\u003e\n\u003cp\u003eThe JOINSUN 2500mAh cell is rated for ≥600 cycles at 0.5C charge \/ 5C discharge, and ≥1000 cycles at 1C charge discharging to 3V (80% depth of discharge at 25℃).\u003c\/p\u003e\n\u003cp\u003eActual cycle life depends on:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCharge and discharge rates\u003c\/li\u003e\n\u003cli\u003eOperating temperature\u003c\/li\u003e\n\u003cli\u003eDepth of discharge\u003c\/li\u003e\n\u003cli\u003eCutoff voltage\u003c\/li\u003e\n\u003cli\u003ePack configuration and cooling\u003c\/li\u003e\n\u003cli\u003eBattery management system settings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e📐 18650 Cell Design\u003c\/h2\u003e\n\u003cp\u003eThe JOINSUN INR18650 uses the standard cylindrical 18650 form factor, measuring approximately:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e0.72\" (18.3mm) diameter × 2.56\" (65mm) length\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease verify compatibility before ordering.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e18650 cells are not universally interchangeable. Confirm:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCell dimensions\u003c\/li\u003e\n\u003cli\u003eTerminal configuration\u003c\/li\u003e\n\u003cli\u003eRequired capacity\u003c\/li\u003e\n\u003cli\u003eContinuous and peak current requirements\u003c\/li\u003e\n\u003cli\u003eCharging requirements\u003c\/li\u003e\n\u003cli\u003eBattery management system compatibility\u003c\/li\u003e\n\u003cli\u003eMechanical fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBattery pack builders\u003c\/li\u003e\n\u003cli\u003eOEM applications\u003c\/li\u003e\n\u003cli\u003eEngineering and prototyping\u003c\/li\u003e\n\u003cli\u003ePower tools\u003c\/li\u003e\n\u003cli\u003eFlashlights\u003c\/li\u003e\n\u003cli\u003ePortable power systems\u003c\/li\u003e\n\u003cli\u003eE-bikes and mobility equipment\u003c\/li\u003e\n\u003cli\u003eCustom lithium-ion battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e📦 Sold Individually\u003c\/h2\u003e\n\u003cp\u003ePrice shown is for ONE battery cell.\u003c\/p\u003e\n\u003cp\u003eThese are individual 18650 cells and are not sold as a pair unless specifically stated in the product options.\u003c\/p\u003e\n\u003cp\u003eFor larger battery-pack projects, contact us regarding bulk quantities and supply requirements.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⚠️ Bare Cell — No Protection Circuit\u003c\/h2\u003e\n\u003cp\u003eThe JOINSUN INR18650 is a bare rechargeable lithium-ion cell.\u003c\/p\u003e\n\u003cp\u003eIt does not include:\u003c\/p\u003e\n\u003cp\u003e❌ Built-in BMS\u003cbr\u003e❌ PCB protection\u003cbr\u003e❌ Over-charge protection\u003cbr\u003e❌ Over-discharge protection\u003cbr\u003e❌ Short-circuit protection\u003c\/p\u003e\n\u003cp\u003eA properly engineered battery pack may require an appropriate BMS\/protection system, depending on the application.\u003c\/p\u003e\n\u003cp\u003eDo not use a bare lithium-ion cell as a direct replacement for a protected battery unless the complete system is specifically designed for that cell.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⚠️ IMPORTANT LITHIUM-ION BATTERY SAFETY INFORMATION\u003c\/h2\u003e\n\u003cp\u003eRechargeable lithium-ion cells can cause fire, explosion, serious injury, or property damage if improperly used, charged, stored, transported, or assembled.\u003c\/p\u003e\n\u003cp\u003eThis is a bare lithium-ion cell intended for knowledgeable users and properly engineered battery systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNever:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eShort-circuit the cell\u003c\/li\u003e\n\u003cli\u003eReverse the polarity\u003c\/li\u003e\n\u003cli\u003eOvercharge or over-discharge the cell\u003c\/li\u003e\n\u003cli\u003eExceed manufacturer-specified operating limits\u003c\/li\u003e\n\u003cli\u003eUse a damaged, dented, swollen, or otherwise compromised cell\u003c\/li\u003e\n\u003cli\u003eAttempt to recharge a damaged cell\u003c\/li\u003e\n\u003cli\u003eExpose the cell to excessive heat\u003c\/li\u003e\n\u003cli\u003eDisassemble or modify the cell\u003c\/li\u003e\n\u003cli\u003eCarry loose cells where they can contact conductive objects\u003c\/li\u003e\n\u003cli\u003eUse incompatible chargers\u003c\/li\u003e\n\u003cli\u003eMix cells with significantly different characteristics in a battery pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBattery packs should be designed and assembled by qualified individuals using appropriate equipment, protection circuitry, charging systems, thermal management, and safety procedures.\u003c\/p\u003e\n\u003cp\u003eThe purchaser is responsible for determining whether this cell is suitable for the intended application and for designing, assembling, testing, charging, using, and storing the finished battery system safely.\u003c\/p\u003e","brand":"JOINSUN","offers":[{"title":"Default Title","offer_id":67777702133862,"sku":"JOINSUN-INR18650-25R","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/9904\/7782\/files\/joinsun-18650-2500mah-battery-1.png?v=1792521574","url":"https:\/\/18650batterypartners.com\/products\/joinsun-18650-2500mah-3-6v-20a-li-ion-rechargeable-battery","provider":"18650 Battery Partners","version":"1.0","type":"link"}