The CNHL Long Range Series 12700mAh 14.4V 4S2P 21700 Li-ion battery combines eight BAK 65E high-energy cells into a 182.88Wh battery pack for larger RC airplanes, fixed-wing aircraft and endurance-oriented UAV systems using XT90. The BAK 65E platform is built around exceptional stored energy and gravimetric energy density, while the 2P architecture allows electrical load to be shared across two cells in each parallel group.
At approximately 630.5g for the pictured production sample, the complete battery achieves approximately 290Wh/kg of finished-pack energy density. This figure includes all eight 21700 cells, pack construction, XT90 connector, 12AWG power leads and balance wiring rather than describing the bare cells alone.
This XT90 configuration is positioned primarily for efficient fixed-wing and UAV platforms where stored energy, operating time and energy-to-weight performance matter more than repeated extreme burst output. XT90 matches a different aircraft connector ecosystem; it does not increase the fundamental capability of the BAK 65E cells compared with the corresponding XT60 version.
Quick Battery Fit & Performance Check
| Battery Type |
21700 Li-ion battery pack |
| Cell Platform |
BAK 65E |
| Configuration |
4S2P / 8 cells |
| Capacity |
12700mAh |
| Nominal Voltage |
14.4V |
| Nominal Pack Energy |
182.88Wh |
| Approx. Weight |
Approx. 630.5g |
| 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 endurance platforms |
Product Specifications
| SKU |
LI1270104S70XT90 |
| Series |
CNHL Long Range Series |
| Chemistry |
Rechargeable Li-ion |
| Cell Format |
21700 |
| Cell Model |
BAK 65E |
| Configuration |
4S2P / 8 cells |
| Capacity |
12700mAh |
| Nominal Voltage |
14.4V |
| Nominal Pack Energy |
182.88Wh |
| Main Connector |
XT90 |
| Main Power Wire |
12AWG |
| Approx. Dimensions |
147 × 43.5 × 44.5mm (5.79 × 1.71 × 1.75in) |
| Approx. Weight |
630.5g / 1.39lb |
| Approx. Pack Energy Density |
Approx. 290Wh/kg |
182.88Wh at Only About 630.5g
The standout characteristic of LI1270104S70XT90 is the amount of stored energy available relative to finished battery mass. With 182.88Wh at approximately 630.5g, the battery reaches approximately 290Wh/kg.
This is a complete-pack value rather than a bare-cell calculation. It includes all eight BAK 65E cells, the XT90 connector, 12AWG power leads, balance wiring and physical battery structure that the aircraft actually carries.
For fixed-wing and UAV applications, this energy-to-weight relationship is particularly important because battery mass directly affects aircraft weight, payload margin and propulsion efficiency.
Approx. 290Wh/kg Finished-Pack Energy Density
High gravimetric energy density is the defining advantage of the BAK 65E platform. Even after eight cells are assembled into a complete 4S2P battery with an XT90 connector and 12AWG wiring, LI1270104S70XT90 retains approximately 290Wh/kg at the finished-pack level.
That makes energy density a primary performance feature rather than simply another specification. Efficient aircraft can carry substantially more stored energy without battery mass increasing at the same rate.
Actual flight or mission endurance still depends on aircraft efficiency, propulsion setup, payload, wind, operating profile and usable depth of discharge.
27% More Energy with Only About 11% More Weight
The advantage of the BAK 65E platform becomes especially clear when this battery is compared with the corresponding CNHL 10000mAh BAK 50D 4S2P XT90 battery.
| Specification |
10000mAh 50D 4S2P XT90 |
12700mAh 65E 4S2P XT90 |
| Pack Energy |
144Wh |
182.88Wh |
| Approx. Weight |
568.5g |
630.5g |
| Pack Wh/kg |
Approx. 253Wh/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 10.9%. This produces approximately 14.5% higher finished-pack gravimetric energy density.
This is why the 12700mAh battery represents a different optimization target rather than simply a higher-capacity version: substantially more mission energy for every kilogram of battery carried.
Powered by BAK 65E – Energy First / Maximum Endurance
The BAK 65E is the high-energy 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 capability.
This design direction is particularly attractive for efficient fixed-wing aircraft and UAVs. Once the aircraft is established in cruise, propulsion demand can be relatively modest, allowing more of the available 182.88Wh to be converted into useful range and operating time.
For systems with greater sustained or repeated high-current demand, the BAK 50D Power + Energy Balance platform may remain the more appropriate direction.
12700mAh 4S2P High-Energy Architecture
Eight BAK 65E cells are arranged as 4S2P. Four series groups establish the 14.4V nominal battery platform, while two 6350mAh cells operate in parallel within each group to create a total pack capacity of 12700mAh.
The 2P architecture also allows electrical load to be shared between two cells within each parallel group. This provides greater current-sharing capability than a corresponding 4S1P 65E pack while preserving the high-energy character of the cell platform.
The trade-off is additional size and mass, so this battery is best suited to larger aircraft capable of converting the extra stored energy into useful operating time.
Maximum-Endurance 4S Li-ion Battery for RC Airplanes
This XT90 configuration is positioned primarily for larger efficient RC airplanes and fixed-wing aircraft where long flight duration is a major design priority.
Large gliders, sailplanes, endurance-oriented utility aircraft and other fixed-wing platforms can benefit from the combination of 182.88Wh total energy and approximately 290Wh/kg finished-pack energy density when their propulsion requirements remain appropriate for the BAK 65E platform.
Browse additional options in the CNHL Li-ion batteries for RC airplanes and fixed-wing aircraft collection.
High-Energy 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 182.88Wh energy reserve to be converted into useful mission range and operating time.
Mapping, inspection, surveying 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 aircraft is designed around the battery's size and mass.
Explore additional mission-oriented products in the CNHL Li-ion UAV battery collection.
A Strong Direction for Mapping and Survey Aircraft
Mapping and survey aircraft often prioritize predictable cruise efficiency, mission duration and useful energy carried per kilogram. These requirements align closely with the Energy First philosophy of the BAK 65E platform.
The nearly 183Wh energy reserve allows appropriately sized fixed-wing UAVs to carry substantial mission energy without moving immediately to even larger 3P battery architectures.
Also Suitable for Large FPV Wings
Although this XT90 version is positioned primarily toward conventional fixed-wing and UAV systems, large FPV wings using XT90 can also make effective use of its high energy density and 182.88Wh total energy.
The deciding factors are battery-bay dimensions, installed weight, center of gravity, launch current and cruise efficiency rather than connector type alone.
XT90 Connector with 12AWG Power Leads
LI1270104S70XT90 uses an XT90 main 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 4S2P 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.
147 × 43.5 × 44.5mm High-Energy Pack
The finished battery measures approximately 147 × 43.5 × 44.5mm. Its elongated configuration allows eight 21700 cells to be packaged into a relatively narrow 4S2P form.
Measure the usable battery compartment before purchase and leave additional clearance for the XT90 connector, 12AWG power leads, balance wiring, securing straps and cooling airflow. For fixed-wing aircraft, verify the final center of gravity with the complete 630.5g battery installed in its intended position.
Part of the CNHL 4S 21700 Long Range Platform
This battery belongs to the CNHL 4S 21700 Li-ion battery range, where 5000mAh, 6350mAh, 10000mAh and 12700mAh configurations provide different balances of energy, pack mass and parallel load sharing.
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 that 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, 182.88Wh stored 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 battery temperature during initial aircraft setup under realistic operating conditions before relying on the battery for extended-duration flights or missions.
FAQ: CNHL 12700mAh 4S 21700 Li-ion Battery with XT90
What cells are used in this battery?
The battery uses eight BAK 65E 6350mAh high-energy 21700 Li-ion cells arranged in a 4S2P 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 four series groups establish the 4S voltage platform.
How much nominal energy does this battery store?
With a 14.4V nominal pack rating and 12700mAh capacity, nominal stored energy is 182.88Wh.
What is the finished-pack energy density?
Based on 182.88Wh of nominal energy and the pictured production sample weight of approximately 630.5g, calculated finished-pack gravimetric energy density is approximately 290Wh/kg.
How does it compare with the 10000mAh BAK 50D 4S2P XT90 battery?
The 12700mAh BAK 65E version stores 27% more nominal energy while the pictured finished-pack weight increases by only about 10.9%. This gives the 65E battery approximately 14.5% 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 are more important 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 airframe 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 4S2P architecture. XT90 changes the connector ecosystem and slightly increases finished pack weight, but does not increase the fundamental electrical 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 147 × 43.5 × 44.5mm and weighs approximately 630.5g.
What connector and wire does it use?
LI1270104S70XT90 uses an XT90 main power connector with 12AWG power leads.
