The CNHL Long Range Series 12700mAh 21.6V 6S2P 21700 Li-ion battery combines twelve BAK 65E high-energy cells into a 274.32Wh battery pack for larger RC airplanes, fixed-wing UAVs and long-endurance aircraft using XT90. The BAK 65E platform is optimized around maximum stored energy and outstanding gravimetric energy density, while the 2P architecture allows electrical load to be shared across two cells in each parallel group.
At approximately 946g for the pictured production sample, the complete battery achieves approximately 290Wh/kg of finished-pack energy density. This figure includes all twelve 21700 cells, pack structure, XT90 connector, 12AWG power leads and balance wiring rather than describing bare-cell performance alone.
This XT90 configuration is positioned primarily for larger efficient fixed-wing aircraft, mapping and survey UAVs, inspection platforms and other endurance-oriented systems where stored energy and energy-to-weight performance matter more than repeated extreme burst output.
Quick Battery Fit & Performance Check
| Battery Type |
21700 Li-ion battery pack |
| Cell Platform |
BAK 65E |
| Configuration |
6S2P / 12 cells |
| Capacity |
12700mAh |
| Nominal Voltage |
21.6V |
| Nominal Pack Energy |
274.32Wh |
| Approx. Weight |
Approx. 946g |
| Approx. Pack Energy Density |
Approx. 290Wh/kg |
| Main Connector |
XT90 |
| Power Wire |
12AWG |
| Performance Direction |
Energy First / Maximum Endurance |
| Primary Applications |
Large RC airplanes, fixed-wing UAVs, mapping, surveying and inspection platforms |
Product Specifications
| SKU |
LI1270106S70XT90 |
| Series |
CNHL Long Range Series |
| Chemistry |
Rechargeable Li-ion |
| Cell Format |
21700 |
| Cell Model |
BAK 65E |
| Configuration |
6S2P / 12 cells |
| Capacity |
12700mAh |
| Nominal Voltage |
21.6V |
| Nominal Pack Energy |
274.32Wh |
| Main Connector |
XT90 |
| Main Power Wire |
12AWG |
| Approx. Dimensions |
150 × 44 × 65mm (5.91 × 1.73 × 2.56in) |
| Approx. Weight |
946g / 2.09lb |
| Approx. Pack Energy Density |
Approx. 290Wh/kg |
274.32Wh at Only About 946g
The defining advantage of LI1270106S70XT90 is how much stored energy it provides relative to complete battery mass. With 274.32Wh at approximately 946g, the battery reaches approximately 290Wh/kg.
This is a finished-pack figure rather than a bare-cell calculation. It includes all twelve BAK 65E cells, XT90 connector, 12AWG power leads, balance wiring and the physical battery structure carried by the aircraft.
For fixed-wing aircraft and UAVs, this relationship is particularly important because battery mass directly affects payload margin, aircraft weight and overall propulsion efficiency.
Approx. 290Wh/kg Finished-Pack Energy Density
High gravimetric energy density is the defining advantage of the BAK 65E platform. Even after twelve cells are assembled into a complete 6S2P battery with XT90, 12AWG wiring and pack structure, this battery retains approximately 290Wh/kg at the finished-pack level.
That makes pack-level Wh/kg one of the most important specifications on this product. Efficient aircraft can carry significantly more watt-hours without battery mass rising at the same rate.
Actual flight and mission endurance still depend on aircraft efficiency, propulsion load, payload, weather, flight profile and usable depth of discharge.
27% More Energy with Only About 10% More Weight
The energy-density advantage of the BAK 65E becomes especially clear when this pack is compared with the corresponding CNHL 10000mAh BAK 50D 6S2P XT90 battery.
| Specification |
10000mAh 50D 6S2P XT90 |
12700mAh 65E 6S2P XT90 |
| Pack Energy |
216Wh |
274.32Wh |
| Approx. Weight |
857.5g |
946g |
| Pack Wh/kg |
Approx. 252Wh/kg |
Approx. 290Wh/kg |
| Cell Direction |
Power + Energy Balance |
Energy First / Maximum Endurance |
The BAK 65E version stores 27% more nominal energy, while the pictured finished-pack weight increases by only approximately 10.3%. That produces approximately 15.1% higher finished-pack gravimetric energy density.
The 12700mAh 65E pack therefore represents a different optimization target rather than simply a higher-capacity battery: substantially more mission energy for each kilogram of battery carried.
Powered by BAK 65E – Energy First / Maximum Endurance
The BAK 65E is the high-energy cell platform within the CNHL 21700 Long Range Series. Its defining advantage is high stored energy relative to cell mass rather than maximizing extreme burst-current output.
This design philosophy aligns particularly well with efficient fixed-wing aircraft and UAVs. Once the aircraft reaches cruise, relatively modest propulsion power can allow a large portion of the 274.32Wh energy reserve to be converted into useful range and operating time.
For platforms with greater repeated or sustained high-current demand, the BAK 50D Power + Energy Balance cell platform may remain the more appropriate direction.
12700mAh 6S2P High-Energy Architecture
Twelve BAK 65E cells are arranged as 6S2P. Six series groups establish the 21.6V nominal battery platform, while two 6350mAh cells operate in parallel within each group to create a total capacity of 12700mAh.
The 2P architecture allows electrical load to be shared between two cells in each parallel group. This provides greater pack-level load sharing than a corresponding 6S1P 65E battery while retaining the high-energy character of the cell platform.
The trade-off is additional size and mass, making this configuration best suited to larger aircraft capable of converting its 274.32Wh energy reserve into useful mission time.
Maximum-Endurance 6S Li-ion Battery for RC Airplanes
This XT90 configuration is positioned primarily for larger efficient 6S RC airplanes and fixed-wing aircraft where endurance is a major design priority.
Large gliders, sailplanes, endurance-oriented utility aircraft and other fixed-wing models can benefit from the combination of a 274.32Wh energy reserve and approximately 290Wh/kg finished-pack energy density when propulsion current remains appropriate for the BAK 65E platform.
Browse additional fixed-wing options in the CNHL Li-ion batteries for RC airplanes and fixed-wing aircraft collection.
274Wh-Class Battery for Fixed-Wing UAVs
Fixed-wing UAVs are one of the strongest application directions for this battery because aerodynamic efficiency can allow a large portion of its 274.32Wh energy reserve to be converted into useful range and mission duration.
Mapping, surveying, inspection and long-duration aerial-imaging platforms can benefit from the combination of high total energy, approximately 290Wh/kg finished-pack energy density and 2P parallel load sharing when the airframe is designed around the pack's dimensions and installed mass.
Explore additional mission-oriented configurations in the CNHL Li-ion UAV battery range.
Built for Mapping, Survey and Inspection Platforms
Mapping, surveying and inspection aircraft often prioritize usable operating time and energy carried per kilogram over minimum battery mass alone. Those requirements align closely with the Energy First design direction of the BAK 65E platform.
The 274.32Wh energy reserve can support long-duration mission profiles without immediately requiring an even larger 3P architecture, provided the aircraft can efficiently carry the approximately 946g pack.
Also Suitable for Large FPV Wings
Although this XT90 version is positioned primarily toward conventional fixed-wing aircraft and UAV platforms, large FPV wings using XT90 can also make effective use of its 274.32Wh energy reserve and high finished-pack energy density.
Battery-bay dimensions, installed mass, center of gravity, launch current and cruise efficiency should determine suitability rather than connector type alone.
XT90 Connector with 12AWG Power Leads
LI1270106S70XT90 uses an XT90 main power connector with 12AWG power leads, making it a natural configuration for larger fixed-wing aircraft and UAV systems already standardized around XT90.
The corresponding XT60 and XT90 versions use the same BAK 65E cells and 6S2P architecture. XT90 therefore does not increase the fundamental electrical capability of the battery cells.
Choose XT90 because it matches the aircraft's electrical installation, not because it represents a higher-power version of the battery.
150 × 44 × 65mm High-Energy Pack
The finished battery measures approximately 150 × 44 × 65mm. Its twelve-cell 6S2P construction makes it a substantial battery, so physical compatibility should be checked carefully before purchase.
Allow additional clearance for the XT90 connector, 12AWG power leads, balance wiring, mounting straps and cooling airflow. For fixed-wing aircraft, verify final center of gravity with the complete 946g battery installed in its intended flight position.
Part of the CNHL 6S 21700 Long Range Platform
This battery belongs to the CNHL 6S 21700 Li-ion battery range, where 1P, 2P and 3P configurations serve different aircraft sizes, mission-energy requirements and load-sharing needs.
It is also part of the CNHL Long Range Series, built around endurance-focused cylindrical Li-ion battery technology.
For broader comparison, explore all CNHL 21700 Li-ion batteries or the complete CNHL Li-ion battery range.
Charging and Battery Safety
Use charging equipment and settings appropriate for the exact finished BAK 65E Li-ion battery specification. Follow the final published charge-voltage and charge-current limits for this pack rather than assuming settings from another Li-ion, LiPo or LiHV battery are interchangeable.
The BAK 65E is an energy-focused cell platform. Do not interpret the 12700mAh capacity, 274.32Wh energy or approximately 290Wh/kg finished-pack energy density as evidence of extreme burst-current capability.
The 2P architecture provides parallel load sharing, but finished-pack capability still depends on the cells, internal connections, 12AWG wiring, XT90 connector, cooling, battery temperature and load duration.
Monitor actual propulsion current and pack temperature during initial aircraft setup under realistic operating conditions before relying on the battery for extended-duration flights or missions.
FAQ: CNHL 12700mAh 6S 21700 Li-ion Battery with XT90
What cells are used in this battery?
The battery uses twelve BAK 65E 6350mAh high-energy 21700 Li-ion cells arranged in a 6S2P configuration.
Why is the pack capacity 12700mAh?
Two 6350mAh cells operate in parallel within each series group, producing a total pack capacity of 12700mAh while six series groups establish the 6S voltage platform.
How much nominal energy does this battery store?
With a 21.6V nominal pack rating and 12700mAh capacity, nominal stored energy is 274.32Wh.
What is the finished-pack energy density?
Based on 274.32Wh nominal energy and the pictured production sample weight of approximately 946g, calculated finished-pack gravimetric energy density is approximately 290Wh/kg.
How does it compare with the 10000mAh BAK 50D 6S2P XT90 battery?
The 12700mAh BAK 65E version stores 27% more nominal energy while the pictured finished-pack weight increases by only about 10.3%. This results in approximately 15% higher finished-pack energy density, while the BAK 50D remains the more power-and-energy-balanced cell direction.
Is this battery intended for RC airplanes?
Yes. Larger efficient fixed-wing RC airplanes are one of the primary application directions for this XT90 version, particularly where endurance and energy-to-weight performance matter more than repeated high-current output.
Can it be used in fixed-wing UAVs?
Yes. Mapping, surveying, inspection and other long-duration fixed-wing UAV applications are strong directions when the aircraft is compatible with the battery's voltage, dimensions, installed mass and electrical capability.
Is the XT90 version more powerful than the XT60 version?
No. Both products use the same BAK 65E cells and 6S2P architecture. XT90 changes the connector ecosystem and slightly changes finished pack weight, but it does not increase the fundamental capability of the cells.
Does 12700mAh mean it has more discharge power than the 10000mAh BAK 50D version?
No. The larger capacity comes from the high-energy BAK 65E platform. Higher capacity and higher energy density should not be interpreted as greater discharge capability than the more power-oriented BAK 50D platform.
What are the dimensions and weight?
The pictured production battery measures approximately 150 × 44 × 65mm and weighs approximately 946g.
What connector and wire does it use?
LI1270106S70XT90 uses an XT90 main power connector with 12AWG power leads.
