{"product_id":"cnhl-bak-65e-6350mah-21700-li-ion-battery-cell","title":"CNHL Long Range Series BAK 65E 6350mAh 3.54V 21700 Li-ion Battery Cell","description":"\u003cp style=\"font-size: 16px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003e\u003cstrong\u003eThe CNHL Long Range Series BAK 65E 6350mAh 21700 Li-ion battery cell is built around one clear priority: maximum stored energy from a lightweight cylindrical cell.\u003c\/strong\u003e With 22.5Wh of energy at only about 72–73g in CNHL measurements, the N21700CX-65E reaches approximately \u003cstrong\u003e310Wh\/kg-class cell-level energy density\u003c\/strong\u003e, making it an exceptional building block for long-endurance FPV, fixed-wing and UAV battery systems.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eUnlike the more power-and-energy-balanced 5000mAh 50D platform, the 6350mAh 65E is positioned as an \u003cstrong\u003eEnergy First \/ Maximum Endurance\u003c\/strong\u003e cell. Its advantage is not extreme burst output, but the ability to store more watt-hours for every kilogram of battery mass carried by the aircraft.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eThis product is an individual cylindrical Li-ion cell rather than a complete ready-to-use RC battery pack. Custom pack construction requires correct cell matching, electrical interconnections, insulation, charging, thermal management and appropriate protection practices.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eQuick Fit \u0026amp; Performance Check\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 14px 0 18px; font-size: 14px; line-height: 1.55;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34%; background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCell Format\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e21700 cylindrical Li-ion cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCell Model\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eBAK N21700CX-65E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eMarked Capacity\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e6350mAh\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e3.54V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCell Energy\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e22.5Wh\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eApprox. Sample Weight\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eApprox. 72–73g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCalculated Energy Density\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eApprox. 308–313Wh\/kg (~310Wh\/kg class)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003ePerformance Direction\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eEnergy First \/ Maximum Endurance\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003ePrimary Applications\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eLong-endurance FPV, RC airplane, fixed-wing and UAV battery projects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 14px 0 18px; font-size: 14px; line-height: 1.55;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34%; background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eSKU\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eLI635101S70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eBrand \/ Series\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eCNHL Long Range Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCell Manufacturer \/ Model\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eBAK N21700CX-65E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eChemistry\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eRechargeable Li-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCell Format\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e21700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eMarked Capacity\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e6350mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e3.54V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCell Energy\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e22.5Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eMaximum Charge Voltage\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e2.50V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eStandard Charge \/ Discharge Current\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e1.3A under standard test conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eDatasheet Maximum Charge\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e13A (2C; specified as a maximum condition, not a standard cycle charge rate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eDatasheet Maximum Discharge\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e26A (4C under specified maximum test conditions; not presented as a continuous cycle rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eAC Internal Resistance\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e≤8mΩ at 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eConsumer-Facing Size\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eApprox. 21mm diameter × 70mm length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eTechnical Size Limit\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eUp to approximately Ø21.75 × 71.0mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eApprox. Sample Weight\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eApprox. 72–73g; pictured sample 73.0g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCalculated Cell-Level Energy Density\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eApprox. 308–313Wh\/kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eApprox. 310Wh\/kg-Class Energy Density – The Key 65E Advantage\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eThe standout feature of the BAK 65E is its \u003cstrong\u003eexceptionally high gravimetric energy density\u003c\/strong\u003e. The cell marking specifies 22.5Wh of stored energy, while cell have weighed approximately 72–73g. This places the 65E in an approximately \u003cstrong\u003e310Wh\/kg-class\u003c\/strong\u003e energy-density range.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eFor aircraft, this matters because every gram of battery must be carried for the entire flight. Higher Wh\/kg means more stored energy can be carried without increasing battery mass at the same rate, which is exactly the type of advantage that can translate into longer useful endurance on an efficient aircraft.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003e65E vs 50D: 25% More Cell Energy with a Much Smaller Weight Increase\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eThe difference becomes especially clear when comparing the two CNHL 21700 Long Range cell directions using actual sample data.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 14px 0 18px; font-size: 14px; line-height: 1.55;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 25%; background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCell\u003c\/td\u003e\n\u003ctd style=\"width: 20%; background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eEnergy\u003c\/td\u003e\n\u003ctd style=\"width: 20%; background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eSample Weight\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCalculated Wh\/kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBAK 50D\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e18Wh\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eApprox. 66g\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eApprox. 273Wh\/kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBAK 65E\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e22.5Wh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eApprox. 72–73g\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eApprox. 308–313Wh\/kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eThe 65E stores approximately \u003cstrong\u003e25% more energy per cell\u003c\/strong\u003e than the 18Wh 50D, while CNHL sample weight increases by only about 9–11%. The result is roughly \u003cstrong\u003e13–15% higher calculated gravimetric energy density\u003c\/strong\u003e at the individual-cell level.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eThis does not make the 65E universally better. The 50D remains the stronger power-and-energy-balanced direction, while the 65E is the clear choice when \u003cstrong\u003emaximum energy per unit of battery mass\u003c\/strong\u003e is the primary design goal.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003e6350mAh and 22.5Wh from a Single 21700 Cell\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eEach 65E cell is marked at \u003cstrong\u003e6350mAh, 3.54V and 22.5Wh\u003c\/strong\u003e. This high cell-level energy allows substantial pack capacity to be created without requiring unusually large numbers of parallel cells.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eFor long-range aircraft, the benefit is not simply a larger mAh number. The important advantage is the combination of total watt-hours and relatively low cell mass, which directly improves the amount of stored energy available for a given battery weight.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003e1P, 2P and 3P High-Energy Battery Pack Possibilities\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 14px 0 18px; font-size: 14px; line-height: 1.55;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%; background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eParallel Configuration\u003c\/td\u003e\n\u003ctd style=\"width: 24%; background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eCommercial Capacity\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eLong Range Direction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e1P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e6350mAh\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eMaximum cell-level energy in a compact pack architecture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e2P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e12700mAh\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eExtended-endurance FPV, fixed-wing and UAV systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e3P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e19000mAh\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eMaximum-endurance large UAV and fixed-wing platforms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eCNHL uses a commercial designation of 19000mAh for the corresponding 65E 3P battery range. Parallel configurations also allow electrical load to be shared across multiple cells, but actual pack capability remains dependent on cell limits, pack construction, interconnections, wiring and thermal conditions.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003e21700 High-Energy Cell for Long-Range FPV\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eFor long-range FPV, the 65E is most attractive when the aircraft has already been optimized around efficient cruising and moderate electrical demand. In these systems, maximum energy per unit of battery mass can be more valuable than additional burst-current capability.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eExplore assembled and application-oriented options in the \u003ca style=\"color: #e60073; text-decoration: underline; font-weight: bold;\" href=\"https:\/\/chinahobbyline.com\/collections\/li-ion-fpv-battery\"\u003eCNHL Li-ion long range FPV battery collection\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eMaximum-Endurance Cell for RC Airplanes and Fixed-Wing Aircraft\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eEfficient fixed-wing aircraft are particularly well positioned to benefit from the 65E because aerodynamic lift can allow relatively low power consumption during steady cruise. That gives the aircraft more opportunity to convert the cell's high Wh\/kg into useful flight time.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eFPV wings, gliders, sailplanes and other endurance-oriented aircraft are strong application directions when launch and climb current remain within the finished battery's capability.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eBrowse the \u003ca style=\"color: #e60073; text-decoration: underline; font-weight: bold;\" href=\"https:\/\/chinahobbyline.com\/collections\/li-ion-airplane-batteries\"\u003eCNHL Li-ion batteries for RC airplanes and fixed-wing aircraft\u003c\/a\u003e collection for finished pack options.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eHigh Energy Density for UAV Battery Systems\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eEnergy density becomes especially important in UAV applications because additional battery mass competes directly with payload and increases the energy required to keep the aircraft in flight.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eThe 65E's approximately 310Wh\/kg-class cell-level energy density makes it a compelling platform for mapping, surveying, inspection and long-duration fixed-wing UAV projects where mission energy has greater value than extreme burst power.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eFor assembled mission-oriented packs, explore the \u003ca style=\"color: #e60073; text-decoration: underline; font-weight: bold;\" href=\"https:\/\/chinahobbyline.com\/collections\/li-ion-uav-batteries\"\u003eCNHL Li-ion UAV battery range\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eEnergy First: When to Choose 65E Instead of 50D\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 14px 0 18px; font-size: 14px; line-height: 1.55;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29%; background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003ePriority\u003c\/td\u003e\n\u003ctd style=\"width: 35%; background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003e50D 5000mAh\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003e65E 6350mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003ePower Headroom\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eStronger direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eSecondary priority\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003eCapacity per Cell\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e5000mAh\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e6350mAh\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003eEnergy per Cell\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e18Wh\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e22.5Wh\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003eCalculated Sample Wh\/kg\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003eApprox. 273Wh\/kg\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eApprox. 308–313Wh\/kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #E60073; color: #fff; padding: 10px; border: 1px solid #ddd;\"\u003eBest Direction\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003ePower + Energy Balance\u003c\/td\u003e\n\u003ctd style=\"background: #f2f2f2; color: #333; padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eEnergy First \/ Maximum Endurance\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eChoose the 65E when the aircraft is efficient enough to make maximum stored energy the higher priority. Choose the 50D when greater usable power headroom is more important than maximizing Wh\/kg.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003ePart of the CNHL Long Range Series\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eThe 65E is part of the \u003ca style=\"color: #e60073; text-decoration: underline; font-weight: bold;\" href=\"https:\/\/chinahobbyline.com\/collections\/cnhl-long-range-series\"\u003eCNHL Long Range Series\u003c\/a\u003e, an endurance-focused battery family designed around high-energy cylindrical Li-ion technology.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eCompare this cell with other options in the \u003ca style=\"color: #e60073; text-decoration: underline; font-weight: bold;\" href=\"https:\/\/chinahobbyline.com\/collections\/21700-li-ion-cells\"\u003eCNHL 21700 Li-ion cell collection\u003c\/a\u003e, browse the complete \u003ca style=\"color: #e60073; text-decoration: underline; font-weight: bold;\" href=\"https:\/\/chinahobbyline.com\/collections\/21700-li-ion-batteries\"\u003e21700 Li-ion battery range\u003c\/a\u003e, or explore all \u003ca style=\"color: #e60073; text-decoration: underline; font-weight: bold;\" href=\"https:\/\/chinahobbyline.com\/collections\/li-ion-batteries\"\u003eCNHL Li-ion batteries\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eCharging and Cell Safety\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eCharge the BAK 65E only with equipment and settings appropriate for rechargeable Li-ion chemistry. The maximum charge voltage is 4.20V per cell. Standard charging conditions should be preferred for routine use, while any higher charge rate must remain within the cell specification and appropriate thermal limits.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eDo not interpret maximum test-condition charge or discharge values as normal continuous operating ratings. Finished battery-pack current capability also depends on parallel count, interconnects, wire size, connector, cooling and cell temperature.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eDo not short-circuit, crush, puncture, reverse-polarize, overcharge, over-discharge or expose the cell to excessive heat. Individual cylindrical cells should be mechanically protected and should never be carried loose with conductive objects that could bridge the terminals.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eCustom multi-cell lithium battery construction requires correct cell matching, insulation, reliable electrical connections and appropriate charging and protection practices. This individual cell is intended for users familiar with safe Li-ion battery handling and pack assembly.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eFAQ: CNHL BAK 65E 6350mAh 21700 Cell\u003c\/h2\u003e\n\u003ch3 style=\"font-size: 15px; font-weight: bold; margin: 14px 0 8px; color: #000;\"\u003eWhat is the capacity of the BAK 65E cell?\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eThe CNHL 65E product uses a commercial and cell-marked capacity of 6350mAh. The cell is marked at 3.54V and 22.5Wh.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; font-weight: bold; margin: 14px 0 8px; color: #000;\"\u003eWhat is the energy density of this 21700 cell?\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eBased on 22.5Wh cell energy and CNHL sample weights of approximately 72–73g, calculated cell-level gravimetric energy density is approximately 308–313Wh\/kg, or about the 310Wh\/kg class.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; font-weight: bold; margin: 14px 0 8px; color: #000;\"\u003eWhy is Wh\/kg important for long-range aircraft?\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eEvery gram of battery must be carried throughout the flight. Higher Wh\/kg means more stored energy is available for a given battery mass, which can improve endurance when the aircraft is efficient enough to make use of that energy.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; font-weight: bold; margin: 14px 0 8px; color: #000;\"\u003eIs the 65E better than the 50D?\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eNot for every application. The 65E provides significantly higher cell-level energy density and is the Energy First \/ Maximum Endurance direction. The 50D provides a stronger balance between energy storage and usable power headroom.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; font-weight: bold; margin: 14px 0 8px; color: #000;\"\u003eCan I use the 65E for a long-range FPV battery?\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eYes, particularly for highly efficient cruising-focused systems where stored energy is a higher priority than extreme burst output. Actual pack current and thermal requirements must still be matched to the aircraft.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; font-weight: bold; margin: 14px 0 8px; color: #000;\"\u003eIs the 65E suitable for UAV battery packs?\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eIt can be especially attractive for mapping, inspection, surveying and efficient fixed-wing UAV applications because its high energy density can provide substantial mission energy without increasing cell mass at the same rate as stored energy.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; font-weight: bold; margin: 14px 0 8px; color: #000;\"\u003eWhat capacities can be created using parallel 65E cells?\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eA 1P configuration provides 6350mAh, 2P provides 12700mAh, and CNHL uses a commercial 19000mAh designation for its corresponding 3P battery range.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; font-weight: bold; margin: 14px 0 8px; color: #000;\"\u003eIs this a complete RC or UAV battery?\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0 0 14px; color: #333;\"\u003eNo. LI635101S70 is one individual 21700 cylindrical Li-ion cell. It does not include a finished multi-cell battery assembly, main power connector or balance connector.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 15px; font-weight: bold; margin: 14px 0 8px; color: #000;\"\u003eWhat is the maximum charge voltage?\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.75; margin: 0; color: #333;\"\u003eThe maximum charge voltage is 4.20V per cell. Always use charging equipment and settings appropriate for Li-ion chemistry and the final battery configuration.\u003c\/p\u003e","brand":"ChinaHobbyLine","offers":[{"title":"US","offer_id":50361370607830,"sku":"LI635101S70 US","price":16.99,"currency_code":"USD","in_stock":false},{"title":"Global","offer_id":50361370706134,"sku":"LI635101S70 GL","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/2_57d4e65d-ef78-42f1-bb7c-9078aadbfeef.png?v=1789725268","url":"https:\/\/chinahobbyline.com\/products\/cnhl-bak-65e-6350mah-21700-li-ion-battery-cell","provider":"ChinaHobbyLine","version":"1.0","type":"link"}