Product overview
The CNHL Long Range Series BAK 65E is a rechargeable cylindrical 21700 lithium-ion cell with a marked capacity of 6350mAh and a stated voltage of 3.54V. Supplied as an individual component for custom battery packs, it emphasizes stored energy and endurance for efficient fixed-wing aircraft, long-range FPV systems and civilian mapping UAVs. These applications depend on cruise current remaining moderate relative to battery capacity. Its 21700 designation refers to a size class approximately 21mm in diameter and 70mm long, rather than exact dimensions for this model.
Pack builders can connect appropriately matched 65E cells in series to raise voltage and in parallel to increase capacity and distribute the load. A 2P configuration has a stated capacity of 12700mAh; the corresponding 3P pack range carries CNHL's commercial capacity designation of 19000mAh. Integration requires suitable cell matching, electrical connections, insulation and wiring. The cell's energy-focused design does not imply greater power capability: charging and flight loads must remain within its voltage, current and temperature limits, including the higher demands of takeoff and climbing. Those demands govern whether it suits a particular aircraft battery system.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | CNHL Long Range Series BAK 65E 6350mAh 21700 Li-ion Cell |
| Marked capacity | 6350mAhMarked cell capacity; finished-pack performance depends on configuration and operating conditions. |
| Published voltage | 3.54VVoltage stated in the visible product name; confirm the detailed cell voltage and charging specifications. |
| Performance direction | Energy First / Maximum EnduranceManufacturer positioning. |
| Recommended selection priority | Maximum stored energy and operating time take priority over higher current demand.Selection guidance for applications prioritizing stored energy over higher current demand. |
| Physical architecture and chemistry | Rechargeable cylindrical 21700 lithium-ion cellShared format description applies to both cells discussed. |
| Integration envelope | Size class approximately 21mm diameter × 70mm lengthApproximate dimensions describe the 21700 size class, not verified dimensions of this specific cell. Exact dimensions vary by manufacturer and model. |
| Intended applications | Battery building for long-endurance fixed-wing aircraft, efficient UAVs and mapping platformsApplication guidance assumes efficient operation and moderate cruise current relative to battery capacity. |
| Supplied configuration | Individual battery cell for integration into a custom battery systemIndividual cells require application-specific equipment and pack assembly knowledge. |
| Pack integration | Supports custom series and parallel battery-pack constructionSeries and parallel arrangements require appropriate cell matching and pack construction. |
| 65E 2P capacity | 12700mAh in 2PManufacturer's stated capacity for a two-cell parallel configuration. |
| 65E 3P capacity designation | 19000mAh commercial designation for 3PCommercial capacity designation for the corresponding 3P pack range, rather than an exact arithmetic total. |
| Electrical and thermal limitations | Cell current and thermal limits constrain application suitability.Match limits to the expected finished-pack load. |
| Pack construction requirements | Appropriate cell matching, electrical interconnections, insulation and wiring are required.Assembly requirements apply to the finished battery system. |
| Cell identifier and format | LI635101S70; individual 21700 cylindrical Li-ion cellSupplied without a finished multi-cell battery assembly, main power connector or balance connector. |
| Parallel configuration capacities |
|
| Maximum charge voltage | 4.20V per cellUse charging equipment and settings appropriate for Li-ion chemistry and the final battery configuration. |
| Application limitation | Efficient cruising with stored energy prioritized over extreme burst outputActual pack current and thermal requirements must match the aircraft. |
| Comparison with 50D | 65E prioritizes energy density; 50D balances energy storage and usable power headroom65E is not better for every application. |
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