The CNHL Long Range Series 19000mAh 21.6V 6S3P 21700 Li-ion battery combines eighteen BAK 65E high-energy cells into a 410.4Wh maximum-endurance battery for large RC airplanes, fixed-wing UAVs, mapping aircraft, survey platforms and other long-duration systems using XT90. Its 6S3P architecture combines a very large onboard energy reserve with three-cell parallel load sharing in each series group.
At approximately 1400g for the pictured production sample, the complete battery achieves approximately 293Wh/kg of finished-pack gravimetric energy density. This figure includes all eighteen 21700 cells, the complete pack structure, XT90 connector, 12AWG power leads and balance wiring.
This XT90 configuration sits at the Maximum Energy / Maximum Endurance end of the CNHL 21700 Long Range platform. It is designed for large, efficient aircraft capable of converting more than 400Wh of onboard energy into useful operating time rather than for small, weight-sensitive or repeated high-burst applications.
Quick Battery Fit & Performance Check
| Battery Type |
21700 Li-ion battery pack |
| Cell Platform |
BAK 65E |
| Configuration |
6S3P / 18 cells |
| Commercial Capacity |
19000mAh |
| Nominal Voltage |
21.6V |
| Nominal Pack Energy |
410.4Wh |
| Approx. Weight |
Approx. 1400g |
| Approx. Pack Energy Density |
Approx. 293Wh/kg |
| Main Connector |
XT90 |
| Power Wire |
12AWG |
| Performance Direction |
Maximum Energy / Maximum Endurance |
| Primary Applications |
Large RC airplanes, fixed-wing UAVs, mapping, surveying, inspection and maximum-endurance aircraft |
Product Specifications
| SKU |
LI1900106S70XT90 |
| Series |
CNHL Long Range Series |
| Chemistry |
Rechargeable Li-ion |
| Cell Format |
21700 |
| Cell Model |
BAK 65E |
| Configuration |
6S3P / 18 cells |
| Commercial Capacity |
19000mAh |
| Nominal Voltage |
21.6V |
| Nominal Pack Energy |
410.4Wh |
| Main Connector |
XT90 |
| Main Power Wire |
12AWG |
| Approx. Dimensions |
148 × 66 × 66mm (5.83 × 2.60 × 2.60in) |
| Approx. Weight |
1400g / 3.09lb |
| Approx. Pack Energy Density |
Approx. 293Wh/kg |
410.4Wh of Maximum-Endurance Mission Energy
LI1900106S70XT90 carries 410.4Wh of nominal stored energy, placing it well beyond ordinary hobby-size 6S batteries. Its purpose is to provide a very large onboard energy reserve for substantial fixed-wing and UAV platforms.
For mapping aircraft, survey UAVs, inspection platforms and other efficient long-duration systems, more than 400Wh of onboard energy can be highly valuable when the airframe is designed to carry the approximately 1.4kg battery efficiently.
Real mission endurance still depends on aircraft efficiency, payload, propulsion system, aerodynamic performance, weather, operating profile and usable battery energy.
Approx. 293Wh/kg Finished-Pack Energy Density
One of the strongest specifications of this battery is its approximately 293Wh/kg finished-pack gravimetric energy density.
This is not a bare-cell energy-density claim. It is calculated from the complete 410.4Wh battery at approximately 1400g, including all eighteen cells, physical pack structure, XT90 connector, 12AWG power wiring and balance lead.
For endurance aircraft, complete-pack Wh/kg is particularly meaningful because it measures the nominal energy carried for each kilogram of battery that the aircraft actually has to lift.
About 27% More Energy with Only About 11% More Weight
The advantage of the BAK 65E platform becomes especially clear when this pack is compared with the corresponding CNHL 15000mAh BAK 50D 6S3P XT90 battery.
| Specification |
15000mAh 50D 6S3P XT90 |
19000mAh 65E 6S3P XT90 |
| Pack Energy |
324Wh |
410.4Wh |
| Approx. Weight |
1264g |
1400g |
| Pack Wh/kg |
Approx. 256Wh/kg |
Approx. 293Wh/kg |
| Cell Direction |
Power + Energy Balance |
Energy First / Maximum Endurance |
The BAK 65E version provides approximately 26.7% more nominal energy, while the pictured finished-pack weight increases by only approximately 10.8%. This produces approximately 14.4% higher finished-pack gravimetric energy density.
That difference captures the purpose of the 65E platform: substantially more mission energy without battery mass increasing at the same rate.
Powered by BAK 65E – Maximum Energy at Large Scale
The BAK 65E is the high-energy cell platform within the CNHL 21700 Long Range Series. Its defining advantage is maximum stored energy relative to cell mass rather than extreme burst-current output.
In this 6S3P configuration, the 65E energy-density advantage is scaled across eighteen cells, producing a finished battery with more than 400Wh of nominal energy while weighing approximately 1.4kg.
For systems with greater repeated or sustained high-current requirements, the BAK 50D Power + Energy Balance platform may remain the more appropriate direction.
19000mAh 6S3P High-Energy Architecture
Eighteen BAK 65E cells are arranged as 6S3P. Six series groups establish the 21.6V nominal voltage platform, while three high-capacity cells operate in parallel within each group.
CNHL uses 19000mAh as the commercial capacity designation for this 6S3P battery. The three-cell parallel architecture also allows electrical demand to be shared across three cells within each series group.
The result is a battery optimized for large endurance platforms where maximum stored energy and long mission duration are more important than minimum battery mass.
Flagship 6S Li-ion Battery for Large RC Airplanes
This XT90 configuration is a natural fit for large efficient RC airplanes and fixed-wing aircraft capable of carrying an approximately 1.4kg battery.
Large gliders, sailplanes, endurance-oriented utility aircraft and other fixed-wing platforms can benefit from the combination of a 410.4Wh energy reserve and approximately 293Wh/kg finished-pack energy density when their electrical requirements are appropriate for the BAK 65E platform.
Browse additional endurance-oriented options in the CNHL Li-ion batteries for RC airplanes and fixed-wing aircraft collection.
410.4Wh Battery for Large Fixed-Wing UAVs
Large fixed-wing UAVs are one of the strongest application directions for this battery because aerodynamic efficiency can allow a significant portion of its 410.4Wh onboard energy reserve to be converted into useful range and mission duration.
Mapping, surveying, inspection and long-duration aerial-imaging aircraft can benefit from the combination of very high total energy, approximately 293Wh/kg finished-pack energy density and 3P parallel load sharing when the airframe is designed around the battery's size and mass.
Explore additional mission-oriented configurations in the CNHL Li-ion UAV battery collection.
Maximum-Endurance Battery for Mapping, Survey and Inspection
Mapping, survey and inspection platforms often prioritize usable watt-hours and energy carried per kilogram over minimum battery size alone. Those requirements align closely with the Energy First design philosophy of the BAK 65E platform.
With more than 400Wh of nominal energy and approximately 293Wh/kg at the complete-pack level, this battery is particularly relevant to large mission-oriented aircraft where coverage area, operating duration and endurance are major design priorities.
XT90 Connector with 12AWG Power Leads
LI1900106S70XT90 uses an XT90 main power connector with 12AWG power leads, making it a natural configuration for larger fixed-wing and UAV systems already standardized around XT90.
The corresponding XT60 and XT90 batteries use the same BAK 65E cell platform and 6S3P architecture. XT90 therefore does not increase the fundamental electrical capability of the cells.
Choose XT90 because it matches the aircraft's electrical installation, not because it represents a higher-power version of the battery.
148 × 66 × 66mm 18-Cell High-Energy Battery
The complete battery measures approximately 148 × 66 × 66mm and weighs approximately 1400g. This is a substantial eighteen-cell pack intended for large-aircraft installations rather than as a universal 6S replacement.
Allow additional clearance for the XT90 connector, 12AWG power leads, balance wiring, mounting hardware and cooling airflow. For fixed-wing aircraft, verify the final center of gravity with the complete 1.4kg 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, energy requirements and endurance targets.
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 battery 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 19000mAh commercial capacity, 410.4Wh energy or approximately 293Wh/kg finished-pack energy density as evidence of extreme burst-current capability.
The 3P architecture provides parallel load sharing, but finished-pack capability still depends on cell limits, 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 missions.
FAQ: CNHL 19000mAh 6S 21700 Li-ion Battery with XT90
What cells are used in this battery?
The battery uses eighteen BAK 65E high-energy 21700 Li-ion cells arranged in a 6S3P configuration.
Why is the commercial capacity 19000mAh?
The battery uses three high-capacity BAK 65E cells in parallel within each series group. CNHL uses 19000mAh as the commercial capacity designation for this 6S3P pack.
How much nominal energy does this battery store?
Using the 21.6V nominal pack rating and 19000mAh commercial capacity, nominal stored energy is 410.4Wh.
What is the finished-pack energy density?
Based on 410.4Wh nominal energy and the pictured production sample weight of approximately 1400g, calculated finished-pack gravimetric energy density is approximately 293Wh/kg.
How does it compare with the 15000mAh BAK 50D 6S3P XT90 battery?
The 19000mAh BAK 65E version provides approximately 26.7% more nominal energy while the pictured finished-pack weight increases by only about 10.8%. This results in approximately 14.4% higher finished-pack energy density, while the BAK 50D remains the more power-and-energy-balanced cell direction.
Is this battery intended for large RC airplanes?
Yes. Large efficient fixed-wing RC airplanes are one of the primary application directions for this XT90 configuration when the aircraft can accommodate the battery's 148 × 66 × 66mm dimensions, approximately 1.4kg mass and electrical characteristics.
Can this battery be used for large UAVs?
Yes. Large fixed-wing UAVs, mapping aircraft, survey platforms and inspection systems are key application directions when the complete aircraft is designed around the battery's voltage, size, mass and electrical capability.
Is the XT90 version more powerful than the XT60 version?
No. Both versions use the same BAK 65E cell platform and 6S3P architecture. XT90 changes the connector ecosystem and slightly changes finished-pack weight, but it does not increase the fundamental capability of the cells.
Does 19000mAh mean it has more discharge power than the 15000mAh BAK 50D version?
No. The higher 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 148 × 66 × 66mm and weighs approximately 1400g.
What connector and wire does it use?
LI1900106S70XT90 uses an XT90 main power connector with 12AWG power leads.
