The CNHL Long Range Series 15000mAh 21.6V 6S3P 21700 Li-ion battery combines eighteen BAK 50D cells into a 324Wh power system for large long-range FPV, heavy UAV platforms, fixed-wing UAVs and endurance-oriented aircraft using XT60. Its 6S3P architecture provides three parallel cells in each series group, increasing total energy while allowing electrical load to be shared across a larger parallel cell group.
At approximately 1259g for the pictured production sample, the finished battery achieves approximately 257Wh/kg of pack-level energy density. This value includes all eighteen 21700 cells, complete pack construction, XT60 connector, 12AWG power leads and balance wiring.
Built around the BAK 50D Power + Energy Balance platform, this battery is intended for larger aircraft that can productively carry more than 1.2kg of battery mass and make effective use of a 324Wh energy reserve. It is not a natural choice for small or highly weight-sensitive FPV builds.
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. 1259g |
| Approx. Pack Energy Density |
Approx. 257Wh/kg |
| Main Connector |
XT60 |
| Power Wire |
12AWG |
| Performance Direction |
Large UAV / Extended Endurance / Power + Energy Balance |
| Primary Applications |
Large long-range FPV, heavy UAVs, fixed-wing UAVs, mapping and inspection platforms |
Product Specifications
| SKU |
LI1500106S70XT60 |
| 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 |
XT60 |
| Main Power Wire |
12AWG |
| Approx. Dimensions |
147 × 65 × 65mm (5.79 × 2.56 × 2.56in) |
| Approx. Weight |
1259g / 2.78lb |
| Approx. Pack Energy Density |
Approx. 257Wh/kg |
324Wh Mission Energy in a 6S3P Pack
LI1500106S70XT60 provides 324Wh of nominal stored energy, moving it well beyond the compact long-range category and into larger aircraft and UAV applications where total mission energy becomes a primary design requirement.
At approximately 1259g, the complete pack still retains approximately 257Wh/kg of finished-pack gravimetric energy density. This includes the full eighteen-cell assembly, connector, wiring, balance lead and external pack construction.
For an appropriately sized aircraft, 324Wh provides a much larger endurance reserve than typical 1P or 2P configurations while maintaining the balanced energy-and-power character of the BAK 50D platform.
6S3P Architecture: Three Cells Sharing Each Parallel Load
The battery uses eighteen BAK 50D cells arranged as 6S3P. Six series groups establish the 21.6V nominal battery voltage, while three 5000mAh cells operate in parallel within every group to create a total capacity of 15000mAh.
Compared with a 6S1P or 6S2P battery using the same cell, the 3P architecture allows electrical demand to be distributed across three parallel cells. This provides greater pack-level load sharing for larger aircraft with higher sustained energy requirements.
Finished-pack capability still depends on the BAK 50D cell limits, internal connections, 12AWG wiring, XT60 connector, battery temperature and load duration. Parallel count should not be interpreted as an unlimited current-rating multiplier.
50% More Energy Than the 10000mAh 6S2P Pack
| Specification |
10000mAh 6S2P XT60 |
15000mAh 6S3P XT60 |
| Cell Count |
12 |
18 |
| Capacity |
10000mAh |
15000mAh |
| Energy |
216Wh |
324Wh |
| Approx. Weight |
852g |
1259g |
| Pack Wh/kg |
Approx. 254Wh/kg |
Approx. 257Wh/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 47.8%.
The larger pack therefore maintains slightly higher finished-pack Wh/kg while adding another parallel cell to each group. Its purpose is clear: more mission energy and greater parallel load sharing for substantially larger aircraft.
Powered by BAK 50D – Power + Energy Balance at Large Scale
The BAK 50D remains the Power + Energy Balance cell platform in the CNHL 21700 Long Range family. Rather than focusing solely on maximum Wh/kg, the 50D combines substantial stored energy with more usable electrical headroom.
The 6S3P architecture extends that character to a much larger scale. Three parallel cells in each series group allow the aircraft load to be distributed across more cells while the pack carries 324Wh of total nominal energy.
This makes the battery particularly relevant where both endurance and useful electrical headroom matter, rather than in systems optimized only for minimum battery mass.
15000mAh 6S Battery for Large Long-Range FPV
This is a battery for large long-range FPV platforms, not a conventional lightweight FPV pack. Aircraft in the roughly 13-inch to 21-inch long-range class and other heavy endurance-focused systems are more natural application directions when they are designed to carry the battery efficiently.
The 324Wh energy reserve can support long-duration cruise operation, while the 3P architecture gives substantially greater parallel load sharing than the smaller 1P versions.
Explore other endurance-oriented options in the CNHL Li-ion long range FPV battery collection.
Large-UAV Battery with 324Wh Mission Energy
Large UAV platforms are one of the most important applications for this battery. The 324Wh energy reserve can support endurance-oriented imaging, inspection and other operations where mission duration matters more than minimizing battery size alone.
The 6S3P architecture also makes the pack more suitable for larger electrical loads than a compact 6S1P configuration because current can be distributed across three cells in every parallel group.
Browse additional mission-oriented products in the CNHL Li-ion UAV battery collection.
A Strong Direction for Large Fixed-Wing UAVs
Large fixed-wing UAVs can make particularly effective use of a 324Wh battery because aerodynamic efficiency allows substantial stored energy to be converted into useful cruise range and operating time.
Mapping, surveying, inspection and aerial-imaging platforms can benefit when their battery bay, payload allowance and center-of-gravity range are designed around the approximately 1.26kg pack.
For conventional fixed-wing applications, browse the CNHL Li-ion batteries for RC airplanes and fixed-wing aircraft collection.
XT60 Connector with 12AWG Power Leads
LI1500106S70XT60 uses an XT60 main power connector with 12AWG power leads, matching the connector ecosystem used by many long-range FPV, large fixed-wing and UAV systems.
Connector type alone does not define finished-pack capability. The BAK 50D cells, 6S3P architecture, internal connections, 12AWG wiring, connector, battery temperature and actual system load must all be evaluated together.
147 × 65 × 65mm 18-Cell Battery Pack
The finished battery measures approximately 147 × 65 × 65mm and weighs approximately 1259g. This is a substantial eighteen-cell battery, so physical compatibility should be verified carefully before purchase.
Allow additional clearance for the XT60 connector, 12AWG power leads, balance wiring, mounting hardware and cooling airflow. For fixed-wing aircraft, verify center of gravity with the complete 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, covering 1P, 2P and 3P architectures for different aircraft sizes, 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, XT60 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 XT60
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 BAK 50D cells operate in parallel in each group, creating 15000mAh total capacity while six series groups establish the 6S voltage platform.
How much energy does this battery store?
With a 21.6V nominal pack voltage 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 1259g, calculated finished-pack gravimetric energy density is approximately 257Wh/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 greater size and battery mass.
Is this battery suitable for long-range FPV?
Yes, but it is intended for large endurance-focused FPV platforms capable of efficiently carrying an approximately 1.26kg battery. It is not intended as a default battery for ordinary lightweight FPV builds.
Can this battery be used for large UAVs?
Yes. Large UAVs, fixed-wing UAVs, mapping, surveying and inspection platforms are key application directions when the complete aircraft is compatible with the pack's voltage, dimensions, weight and electrical capability.
Is this simply a higher-capacity version of the 10000mAh pack?
It uses the same BAK 50D cell platform, but the 6S3P architecture adds a third parallel cell to each group. This provides 50% more nominal energy and greater parallel load sharing while also substantially increasing battery size and weight.
What are the dimensions and weight?
The pictured production battery measures approximately 147 × 65 × 65mm and weighs approximately 1259g.
What connector and wire does it use?
LI1500106S70XT60 uses an XT60 main power connector with 12AWG power leads.
