The CNHL Long Range Series 15000mAh 21.6V 6S3P 21700 Li-ion battery combines eighteen BAK 50D cells into a 324Wh battery system for large RC airplanes, fixed-wing UAVs, mapping platforms and other endurance-oriented aircraft using XT90. Its 6S3P architecture uses three parallel cells in each series group, providing substantially more stored energy while distributing electrical load across a larger parallel cell group.
At approximately 1264g for the pictured production sample, the complete battery provides approximately 256Wh/kg of finished-pack energy density. This figure includes all eighteen 21700 cells, complete pack structure, XT90 connector, 12AWG power wiring and balance leads.
Built around the BAK 50D Power + Energy Balance platform, this 6S3P battery is designed for substantially larger aircraft that can efficiently carry more than 1.2kg of battery mass and make productive use of a 324Wh mission-energy reserve.
Quick Battery Fit & Performance Check
| Battery Type |
21700 Li-ion battery pack |
| Cell Platform |
BAK 50D |
| Configuration |
6S3P / 18 cells |
| Capacity |
15000mAh |
| Nominal Voltage |
21.6V |
| Nominal Pack Energy |
324Wh |
| Approx. Weight |
Approx. 1264g |
| Approx. Pack Energy Density |
Approx. 256Wh/kg |
| Main Connector |
XT90 |
| Power Wire |
12AWG |
| Performance Direction |
Large UAV / Extended Endurance / Power + Energy Balance |
| Primary Applications |
Large RC airplanes, fixed-wing UAVs, mapping, survey and inspection platforms |
Product Specifications
| SKU |
LI1500106S70XT90 |
| Series |
CNHL Long Range Series |
| Chemistry |
Rechargeable Li-ion |
| Cell Format |
21700 |
| Cell Model |
BAK INR2170-50D |
| Configuration |
6S3P / 18 cells |
| Capacity |
15000mAh |
| Nominal Voltage |
21.6V |
| Maximum Charge Voltage |
25.2V (4.20V per cell) |
| Nominal Pack Energy |
324Wh |
| Main Connector |
XT90 |
| Main Power Wire |
12AWG |
| Approx. Dimensions |
147 × 65 × 66mm (5.79 × 2.56 × 2.60in) |
| Approx. Weight |
1264g / 2.79lb |
| Approx. Pack Energy Density |
Approx. 256Wh/kg |
324Wh Mission Energy for Larger Aircraft
LI1500106S70XT90 provides 324Wh of nominal stored energy, placing it firmly in the large-aircraft and large-UAV category rather than the compact long-range battery segment.
At approximately 1264g, the complete battery retains approximately 256Wh/kg of finished-pack energy density. This includes the entire eighteen-cell assembly, XT90 connector, 12AWG power wiring, balance lead and external battery structure.
For a properly sized fixed-wing or UAV platform, the 324Wh energy reserve can provide substantially more mission time than smaller 1P and 2P configurations while preserving the balanced character of the BAK 50D cell platform.
6S3P Architecture with Triple-Parallel Load Sharing
Eighteen BAK 50D cells are arranged as 6S3P. Six series groups establish the 21.6V nominal pack voltage, while three 5000mAh cells operate in parallel within each group to create a total capacity of 15000mAh.
Compared with 6S1P and 6S2P configurations using the same cell, the 3P architecture allows electrical demand to be distributed across three parallel cells in each group. This makes the platform better suited to substantially larger aircraft with higher sustained energy requirements.
Finished-pack current capability still depends on cell limits, internal interconnections, 12AWG wiring, XT90 connector, temperature, cooling and load duration. Parallel count should not be treated as an unrestricted current multiplier.
50% More Energy Than the 10000mAh 6S2P Battery
| Specification |
10000mAh 6S2P XT90 |
15000mAh 6S3P XT90 |
| Cell Count |
12 |
18 |
| Capacity |
10000mAh |
15000mAh |
| Energy |
216Wh |
324Wh |
| Approx. Weight |
857.5g |
1264g |
| Pack Wh/kg |
Approx. 252Wh/kg |
Approx. 256Wh/kg |
| Parallel Architecture |
2P |
3P |
Moving from the 10000mAh 6S2P battery to this 15000mAh 6S3P configuration increases nominal stored energy by 50%, while the pictured finished-pack weight increases by approximately 47.4%.
The 6S3P pack therefore maintains slightly higher finished-pack energy density while adding a third parallel cell to each group. Its role is clear: more mission energy and more parallel load sharing for substantially larger aircraft.
Powered by BAK 50D – Power + Energy Balance at Large Scale
The BAK 50D is the Power + Energy Balance platform within the CNHL 21700 Long Range Series. It combines substantial stored energy with more usable electrical headroom than a cell platform optimized only around maximum Wh/kg.
The 6S3P architecture scales that philosophy to a much larger battery. Three cells share the electrical load within each parallel group while the complete battery carries 324Wh of nominal energy.
This makes the battery particularly relevant to larger aircraft where both endurance and useful power headroom matter more than simply minimizing battery mass.
15000mAh 6S Li-ion Battery for Large RC Airplanes
This XT90 configuration is positioned primarily for large efficient RC airplanes and fixed-wing aircraft capable of productively carrying a 1.264kg battery and making use of its 324Wh energy reserve.
Large utility aircraft, endurance-oriented fixed-wing models, gliders and other platforms with substantial battery volume can benefit when the added mission energy justifies the installed mass.
Browse additional fixed-wing options in the CNHL Li-ion batteries for RC airplanes and fixed-wing aircraft collection.
324Wh Battery for Large Fixed-Wing UAVs
Large fixed-wing UAVs are one of the strongest applications for this battery. Aerodynamic efficiency can allow a significant portion of the 324Wh onboard 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 and 3P parallel load sharing when the aircraft is designed around the battery's size, weight and electrical capability.
Explore additional mission-oriented batteries in the CNHL Li-ion UAV battery collection.
Built for Mapping, Survey and Inspection Platforms
For mapping, survey and inspection aircraft, useful mission duration can matter more than minimizing battery weight alone. A 324Wh onboard energy reserve gives larger UAV systems substantial operating-energy capacity for extended missions.
Suitability ultimately depends on aircraft efficiency, payload, battery bay, center of gravity and real propulsion current. The battery should therefore be selected as part of the complete aircraft energy and weight budget.
XT90 Connector with 12AWG Power Leads
LI1500106S70XT90 uses an XT90 main power connector with 12AWG power leads, matching the connector ecosystem commonly used on larger fixed-wing aircraft and UAV platforms.
The XT90 and XT60 versions use the same BAK 50D cells and the same 6S3P architecture. XT90 therefore does not increase the underlying capability of the cell platform.
Choose XT90 because it matches the aircraft's electrical installation, not because it represents a higher-power version of the battery.
147 × 65 × 66mm 18-Cell Battery Pack
The finished battery measures approximately 147 × 65 × 66mm and weighs approximately 1264g. This is a substantial eighteen-cell battery and should be treated as a large-aircraft battery rather than a universal 6S replacement.
Allow additional clearance for the XT90 connector, 12AWG power wiring, balance lead, mounting hardware and cooling airflow. For fixed-wing applications, verify final center of gravity with the complete 1.264kg 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 architectures serve different aircraft sizes, mission-energy requirements and parallel 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 a charger and charge mode appropriate for Li-ion chemistry. The BAK 50D cells use a maximum charge voltage of 4.20V per cell, or 25.2V for this complete 6S battery.
Do not assume that 6S Li-ion, LiPo and LiHV batteries use identical charging profiles, warning thresholds or low-voltage cutoff settings. Confirm battery chemistry and system-voltage requirements before use.
The 3P architecture provides increased parallel load sharing, but finished-pack capability still depends on cell limits, internal connections, 12AWG wiring, XT90 connector, cooling, ambient conditions and battery temperature.
Monitor actual propulsion current and pack temperature during initial system testing under realistic loads before relying on the battery for long-duration missions.
FAQ: CNHL 15000mAh 6S 21700 Li-ion Battery with XT90
What cells are used in this battery?
The battery uses eighteen BAK INR2170-50D 5000mAh 21700 Li-ion cells arranged in a 6S3P configuration.
Why is the capacity 15000mAh?
Three 5000mAh cells operate in parallel in every group, creating a total capacity of 15000mAh while six series groups establish the 6S voltage platform.
How much energy does this battery store?
With a 21.6V nominal pack rating and 15000mAh capacity, nominal stored energy is 324Wh.
What is the finished-pack energy density?
Based on 324Wh nominal energy and the pictured production sample weight of approximately 1264g, calculated finished-pack gravimetric energy density is approximately 256Wh/kg.
What is the advantage of 6S3P over 6S2P?
The 6S3P architecture increases capacity from 10000mAh to 15000mAh when using BAK 50D cells, raises nominal energy from 216Wh to 324Wh and distributes electrical load across three parallel cells rather than two. The trade-off is a larger and heavier battery.
Is this battery intended for RC airplanes?
Yes, but it is intended for larger efficient fixed-wing aircraft capable of accommodating a 147 × 65 × 66mm battery weighing approximately 1.264kg. It is not a universal replacement for smaller 6S airplane batteries.
Can this battery be used for large UAVs?
Yes. Large fixed-wing UAVs, mapping, surveying, inspection and other endurance platforms are key application directions when the complete aircraft is compatible with the pack's voltage, dimensions, installed mass and electrical capability.
Is the XT90 version more powerful than the XT60 version?
No. Both versions use the same BAK 50D cells and 6S3P architecture. XT90 changes the connector ecosystem and slightly changes finished-pack weight, but does not increase the fundamental capability of the cells.
What are the dimensions and weight?
The pictured production battery measures approximately 147 × 65 × 66mm and weighs approximately 1264g.
What connector and wire does it use?
LI1500106S70XT90 uses an XT90 main power connector with 12AWG power leads.
