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 large FPV wings, fixed-wing UAVs and endurance-focused aircraft using XT60. The 65E platform is designed around maximum stored energy and exceptional gravimetric energy density, while the 2P architecture also allows electrical load to be shared across two cells in each parallel group.
At approximately 626g for the pictured production sample, the complete battery achieves approximately 292Wh/kg of finished-pack energy density. This value includes all eight 21700 cells, pack structure, XT60 connector, 12AWG power leads and balance wiring rather than describing the bare cells alone.
This battery is positioned around Energy First / Maximum Endurance. It is particularly attractive for efficient long-range aircraft that can make effective use of a large energy reserve without requiring the repeated extreme burst output associated with racing, aggressive freestyle or other high-C LiPo applications.
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. 626g |
| Approx. Pack Energy Density |
Approx. 292Wh/kg |
| Main Connector |
XT60 |
| Power Wire |
12AWG |
| Performance Direction |
Energy First / Maximum Endurance |
| Primary Applications |
Large FPV wings, fixed-wing UAVs, mapping, survey and long-endurance aircraft |
Product Specifications
| SKU |
LI1270104S70XT60 |
| 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 |
XT60 |
| Main Power Wire |
12AWG |
| Approx. Dimensions |
147 × 43.5 × 44.5mm (5.79 × 1.71 × 1.75in) |
| Approx. Weight |
626g / 1.38lb |
| Approx. Pack Energy Density |
Approx. 292Wh/kg |
182.88Wh at Only About 626g
The standout characteristic of LI1270104S70XT60 is the amount of stored energy available relative to finished pack mass. With 182.88Wh at approximately 626g, the battery reaches approximately 292Wh/kg.
This is a finished-pack value rather than a bare-cell calculation. It includes all eight BAK 65E cells, the XT60 connector, 12AWG power wiring, balance lead and complete pack structure that the aircraft actually carries.
For endurance-focused aircraft, this relationship can be more meaningful than mAh alone because the goal is to carry as many useful watt-hours as possible without increasing aircraft mass at the same rate.
Approx. 292Wh/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 RC battery, LI1270104S70XT60 retains approximately 292Wh/kg at the finished-pack level.
That makes energy density a primary product feature rather than simply another specification. Efficient long-range aircraft can carry substantially more stored energy without battery mass increasing at the same rate.
Actual endurance still depends on propulsion efficiency, aircraft weight, payload, wind, flight 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 XT60 battery.
| Specification |
10000mAh 50D 4S2P |
12700mAh 65E 4S2P |
| Pack Energy |
144Wh |
182.88Wh |
| Approx. Weight |
564g |
626g |
| Pack Wh/kg |
Approx. 255Wh/kg |
Approx. 292Wh/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 11%. This results in approximately 14.4% higher finished-pack gravimetric energy density.
This is why the 12700mAh battery should not be described merely as a higher-capacity alternative. Its purpose is to provide significantly 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 makes the 65E particularly attractive for efficient aircraft that spend most of their operating time at moderate electrical loads. In these systems, high Wh/kg can translate directly into a larger usable mission-energy reserve.
For aircraft with greater sustained or repeated high-current demand, the BAK 50D Power + Energy Balance platform may remain the stronger starting point.
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 in every parallel group. This gives the pack greater current-sharing capability than a corresponding 4S1P 65E battery while retaining the high-energy character of the cell platform.
The trade-off is additional size and mass, so this pack is best matched to larger aircraft capable of converting the additional stored energy into useful range or operating time.
Maximum-Endurance 4S Battery for Large FPV Wings
Large FPV wings are one of the strongest application directions for this battery. Efficient fixed-wing cruise can make excellent use of a 182.88Wh energy reserve while avoiding the continuous lift-generation power required by a multirotor.
The approximately 292Wh/kg finished-pack energy density is especially valuable when the airframe can carry 626g efficiently and has sufficient battery volume for the elongated 4S2P pack.
Explore additional endurance-focused options in the CNHL Li-ion long range FPV battery collection.
High-Energy Battery for Fixed-Wing UAVs
Fixed-wing UAVs are another natural application for this pack because aerodynamic efficiency can allow a large share of the 182.88Wh energy reserve to be converted into useful mission range and operating time.
Mapping, surveying, inspection and long-duration aerial-imaging platforms can benefit from the combination of high total energy, approximately 292Wh/kg finished-pack energy density and 2P parallel load sharing when the aircraft is designed around the pack's dimensions and installed mass.
Browse additional mission-oriented batteries in the CNHL Li-ion UAV battery collection.
Also Suitable for Large Efficient RC Airplanes
Although this XT60 configuration is positioned primarily toward large FPV wings and UAV platforms, larger efficient RC airplanes using XT60 can also make effective use of its high energy capacity.
Battery-bay dimensions, takeoff current, climbing current, installed weight and center of gravity should all be verified carefully before choosing a 12700mAh battery for fixed-wing use.
Browse the CNHL Li-ion batteries for RC airplanes and fixed-wing aircraft collection for additional endurance-oriented options.
XT60 Connector with 12AWG Power Leads
LI1270104S70XT60 uses an XT60 main power connector with 12AWG power leads, matching the connector ecosystem used across many long-range FPV wings, fixed-wing platforms and UAV systems.
The connector itself does not determine the fundamental capability of the battery. Cell platform, 4S2P architecture, internal connections, wiring, connector, temperature and actual aircraft load all need to be considered together.
147 × 43.5 × 44.5mm High-Energy Pack
The finished battery measures approximately 147 × 43.5 × 44.5mm. Its elongated form allows eight 21700 cells to be packaged into a relatively narrow 4S2P layout.
Measure the usable battery compartment before purchase and leave additional clearance for the XT60 connector, 12AWG power leads, balance wiring, securing straps and cooling airflow. For fixed-wing aircraft, verify the final center of gravity with the full 626g battery installed.
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 power, 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 the 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 292Wh/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, XT60 connector, cooling, pack 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 XT60
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 the 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 626g, calculated finished-pack gravimetric energy density is approximately 292Wh/kg.
How does it compare with the 10000mAh BAK 50D 4S2P battery?
The 12700mAh BAK 65E version stores 27% more nominal energy while the pictured finished-pack weight increases by only about 11%. This gives the 65E pack approximately 14.4% higher finished-pack energy density, while the BAK 50D remains the more power-and-energy-balanced cell direction.
Is this battery suitable for long-range FPV?
Yes, particularly for large efficient FPV wings and other endurance-focused aircraft capable of carrying the 626g battery efficiently. It is not intended as the default battery for small weight-sensitive FPV builds.
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.
Does 12700mAh mean this battery has more discharge power than the 10000mAh 50D version?
No. The larger capacity comes from the high-energy BAK 65E cell 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 626g.
What connector and wire does it use?
LI1270104S70XT60 uses an XT60 main power connector with 12AWG power leads.
