The CNHL Long Range Series 6350mAh 21.6V 6S1P 21700 Li-ion battery combines six BAK 65E high-energy cells into a 137.16Wh pack designed for ultra-endurance FPV, FPV wings and efficient 6S aircraft. The 65E platform is optimized around maximum stored energy and exceptional gravimetric energy density, making this battery especially attractive when endurance matters more than extreme burst output.
At approximately 477.5g for the pictured production sample, the finished battery achieves approximately 287Wh/kg of pack-level energy density. This figure includes the complete battery assembly, XT60 connector, 12AWG power leads and balance wiring rather than describing the bare cells alone.
This XT60 configuration is positioned primarily for highly efficient long-range FPV and fixed-wing systems that can make effective use of its high stored energy. Because the battery uses a 6S1P architecture, electrical load is not shared across parallel cells, so actual propulsion current must remain appropriate for the energy-focused BAK 65E platform.
Quick Battery Fit & Performance Check
| Battery Type |
21700 Li-ion battery pack |
| Cell Platform |
BAK 65E |
| Configuration |
6S1P / 6 cells |
| Capacity |
6350mAh |
| Nominal Voltage |
21.6V |
| Nominal Pack Energy |
137.16Wh |
| Approx. Weight |
Approx. 477.5g |
| Approx. Pack Energy Density |
Approx. 287Wh/kg |
| Main Connector |
XT60 |
| Power Wire |
12AWG |
| Performance Direction |
Energy First / Maximum Endurance |
| Primary Applications |
Ultra-endurance FPV, FPV wings and efficient fixed-wing aircraft |
Product Specifications
| SKU |
LI635106S70XT60 |
| Series |
CNHL Long Range Series |
| Chemistry |
Rechargeable Li-ion |
| Cell Format |
21700 |
| Cell Model |
BAK 65E |
| Configuration |
6S1P / 6 cells |
| Capacity |
6350mAh |
| Nominal Voltage |
21.6V |
| Nominal Pack Energy |
137.16Wh |
| Main Connector |
XT60 |
| Main Power Wire |
12AWG |
| Approx. Dimensions |
73.5 × 43.5 × 65mm (2.89 × 1.71 × 2.56in) |
| Approx. Weight |
477.5g / 1.05lb |
| Approx. Pack Energy Density |
Approx. 287Wh/kg |
137.16Wh at Only About 477.5g
The defining advantage of this battery is how much nominal energy it stores relative to finished pack weight. With 137.16Wh at approximately 477.5g, LI635106S70XT60 reaches roughly 287Wh/kg.
This is a finished-pack measurement rather than a bare-cell calculation. It includes six 21700 cells, the complete pack structure, XT60 connector, 12AWG power wiring and balance lead.
For aircraft applications, this finished-pack value is especially meaningful because it represents the amount of nominal stored energy available for the actual battery mass the aircraft must carry.
Approx. 287Wh/kg Finished-Pack Energy Density
The underlying BAK 65E cell platform reaches approximately 310Wh/kg-class cell-level energy density based on CNHL sample measurements. Even after six cells are assembled into a complete 6S battery, this pack retains approximately 287Wh/kg.
That is one of the most important specifications on this product. Higher pack-level Wh/kg means the aircraft can carry more stored energy without battery mass increasing at the same rate, which is exactly the type of characteristic needed in endurance-focused flight systems.
Actual endurance still depends on aircraft efficiency, propulsion load, payload, wind, flight profile and usable depth of discharge.
27% More Energy with Only About 11% More Weight
The energy-density advantage becomes especially clear when this 6350mAh BAK 65E pack is compared with the corresponding CNHL 5000mAh BAK 50D 6S1P XT60 battery.
| Specification |
5000mAh 50D 6S XT60 |
6350mAh 65E 6S XT60 |
| Pack Energy |
108Wh |
137.16Wh |
| Approx. Weight |
432g |
477.5g |
| Pack Wh/kg |
Approx. 250Wh/kg |
Approx. 287Wh/kg |
| Performance Direction |
Power + Energy Balance |
Energy First / Maximum Endurance |
The 65E version stores approximately 27% more nominal energy, while pictured finished-pack weight increases by only about 10.5%. This produces approximately 15% higher finished-pack gravimetric energy density.
That distinction explains the purpose of the 65E platform. It is not simply a 5000mAh battery with extra capacity; it is designed around maximizing stored energy for each kilogram of battery carried.
Powered by BAK 65E – Energy First / Maximum Endurance
The BAK 65E is the high-energy platform in the CNHL 21700 Long Range family. Its defining advantage is high energy density rather than extreme burst-current capability.
This makes it especially interesting for aircraft that spend most of their operating time at efficient cruising loads. When propulsion demand remains moderate, carrying more Wh without a proportional increase in battery mass can create a meaningful endurance advantage.
For systems with higher sustained or repeated current demand, the power-and-energy-balanced 50D platform may remain the more appropriate starting point.
6S1P High-Energy Architecture
LI635106S70XT60 uses six 21700 cells in a 6S1P architecture. This provides 6350mAh capacity and 137.16Wh of nominal pack energy while keeping the total cell count to six.
That is important for weight-sensitive long-range aircraft. Moving to a 6S2P battery doubles the cell count and provides substantially more stored energy and parallel load sharing, but also creates a much heavier battery.
Because this pack remains 1P, electrical current is not shared between parallel cells. Propulsion requirements therefore need to remain appropriate for the energy-focused BAK 65E cell platform.
6S Ultra-Endurance Li-ion Battery for Long-Range FPV
This battery is positioned primarily for efficient 6S long-range FPV systems where maximum flight energy is more important than aggressive power delivery. Its 137.16Wh energy capacity provides a substantial endurance reserve without requiring a heavier 2P architecture.
Efficient cruising multirotors can benefit when hover, climb and maneuvering currents remain appropriate for the 65E platform. It should not be selected simply because a model normally uses a 6S LiPo; actual current demand matters.
Explore additional endurance-focused products in the CNHL Li-ion long range FPV battery collection.
High-Energy 6S Battery for FPV Wings
FPV wings are an especially strong application direction for this battery because efficient fixed-wing cruise can make excellent use of high pack-level energy density.
Once established in cruise, a well-designed wing may require relatively modest power, allowing more of the 137.16Wh battery energy to be converted into useful distance and operating time.
Launch current, climb current, battery-bay dimensions, installed weight and center of gravity should always be checked before installation.
Also Suitable for Efficient Fixed-Wing Aircraft
Although this XT60 SKU is positioned primarily around long-range FPV, XT60 is also widely used in conventional fixed-wing aircraft. Efficient gliders, sailplanes and endurance-oriented RC airplanes can benefit from the battery's strong energy-to-weight performance when propulsion current is compatible with the 65E platform.
Browse other application-oriented options in the CNHL Li-ion batteries for RC airplanes and fixed-wing aircraft collection.
XT60 Connector with 12AWG Power Leads
LI635106S70XT60 uses an XT60 main power connector with 12AWG leads, matching a connector ecosystem widely used by long-range FPV, FPV wing and efficient fixed-wing aircraft.
Connector choice does not determine the fundamental electrical capability of the cells. Cell platform, 6S1P architecture, internal construction, wiring, temperature and actual aircraft load must all be considered together.
Compact 73.5 × 43.5 × 65mm Pack Size
The finished battery measures approximately 73.5 × 43.5 × 65mm. Despite storing more than 137Wh of nominal energy, the six-cell 6S1P architecture remains substantially more compact than a corresponding 2P battery.
Measure the usable battery compartment before purchase and leave additional clearance for the XT60 connector, 12AWG power leads, balance wiring, battery securing system and airflow.
6350mAh 6S1P vs 12700mAh 6S2P
| Configuration |
Main Advantage |
Application Direction |
| 6350mAh 6S1P |
Very high energy density with only six cells |
Weight-sensitive long-range FPV, wings and efficient aircraft |
| 12700mAh 6S2P |
Twice the parallel capacity plus current sharing |
Larger FPV, fixed-wing and UAV platforms designed for higher battery mass |
The 2P architecture provides significantly more total energy, but the 1P pack can be more efficient when reducing battery mass is critical. The correct choice depends on whether the airframe can productively carry the additional six cells.
Part of the CNHL 6S 21700 Long Range Platform
This battery belongs to the CNHL 6S 21700 Li-ion battery range, where 5000mAh, 6350mAh, 10000mAh, 12700mAh, 15000mAh and 19000mAh configurations serve different energy, current and aircraft-weight requirements.
It is also part of the CNHL Long Range Series, built around endurance-oriented 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 finished pack rather than assuming that settings from another Li-ion, LiPo or LiHV battery are interchangeable.
The 65E platform is designed around high stored energy. Do not interpret its 6350mAh capacity, 137.16Wh pack energy or high Wh/kg figure as evidence of high-burst discharge capability. Propulsion current and battery temperature must remain appropriate for the finished pack.
Inspect the battery, XT60 connector, wiring and wrapping before charging or flight. Do not use or charge a pack that is damaged, excessively hot or electrically abnormal.
During initial aircraft setup, monitor actual propulsion current and battery temperature under realistic operating conditions before relying on the battery for extended-duration flights.
FAQ: CNHL 6350mAh 6S 21700 Li-ion Battery with XT60
What cells are used in this battery?
The battery uses six BAK 65E 6350mAh high-energy 21700 Li-ion cells in a 6S1P configuration.
How much energy does this 6S battery store?
The finished pack is rated at 137.16Wh of nominal energy with a 6350mAh capacity and 21.6V nominal product rating.
What is the finished-pack energy density?
Based on the pictured production sample weight of approximately 477.5g and 137.16Wh nominal energy, calculated finished-pack gravimetric energy density is approximately 287Wh/kg.
Why is this battery more energy-dense than the 5000mAh 6S XT60 version?
The BAK 65E is optimized around high stored energy. Compared with the corresponding 5000mAh 50D 6S1P XT60 battery, this pack provides approximately 27% more nominal energy while the pictured finished-pack weight increases by only about 10.5%.
Is this one of CNHL's main ultra-endurance FPV batteries?
Yes. The 6350mAh 6S1P BAK 65E XT60 configuration is positioned as an ultra-endurance option for highly efficient cruising-focused FPV systems where energy density has greater value than extreme burst output.
Is this better than the 5000mAh BAK 50D version?
Not for every aircraft. The 6350mAh 65E version provides higher capacity and significantly higher pack-level energy density. The 5000mAh 50D version is the stronger direction when greater usable power headroom is more important than maximizing Wh/kg.
Can this battery be used in an FPV wing?
Yes. Efficient FPV wings are one of the strongest applications for this battery because relatively low cruise power can allow effective use of its 137.16Wh energy capacity and approximately 287Wh/kg finished-pack energy density.
What are the dimensions and weight?
The pictured production battery measures approximately 73.5 × 43.5 × 65mm and weighs approximately 477.5g.
What connector and wire does it use?
LI635106S70XT60 uses an XT60 main power connector with 12AWG leads.
Does 6350mAh mean it has more discharge power than the 5000mAh pack?
No. The higher capacity comes from the energy-focused BAK 65E cell platform. Higher capacity and higher energy density should not be interpreted as greater discharge capability than the more power-and-energy-balanced BAK 50D platform.
