350Wh/kg 6S 22.2V 40000mAh 5C semi-solid Li-ion Drone Battery
<p>The KNS semi-solid Li-ion drone battery offers 350Wh/kg energy density, 40,000mAh capacity at 6S 22.2V, and 5C max discharge. This combination delivers extended flight endurance and reliable power for heavy-lift operations. The semi-solid electrolyte significantly improves safety by reducing leakage and thermal runaway risks compared to conventional liquid batteries. Designed for professional UAVs in surveying, m…
About this product
Product information from the supplier.




Model | KNS-350-40AH6S |
Voltage | 22.2V |
Capacity | 40000mAh |
Continuous Discharge | 3C |
Max.Discharge | 5C |
Charge | 0.5-1C |
Energy | 888Wh |
Energy density | 350Wh/kg |
217*89*68 | 205*88*65mm |
Weight | 2750g |
Plug | XT90S |
Charge Working Condition Temperature | 0℃~45℃ |
Discharge Working Condition Temperature | -20℃~55℃ |
Cycle life | 500 cycles |

The KNS semi-solid Li-ion drone battery delivers 350Wh/kg energy density with 40,000mAh capacity at 22.2V (6S). It supports 3C continuous discharge, balancing high power with extended flight time. The semi-solid electrolyte minimizes leakage and thermal runaway risks, offering safer operation than traditional liquid batteries. Ideal for professional UAVs requiring both endurance and reliability.


Mapping & Surveying – Longer flight time and larger coverage per mission, reducing field trips and battery swaps.
Infrastructure Inspection – Stable power output ensures reliable data capture for bridges, pipelines, and power lines.
Logistics & Cargo – High endurance supports longrange delivery and heavyload transport for commercial fleets.
Search & Rescue – Safe semisolid operation in remote areas, even under harsh or unpredictable conditions.


Cell match – Check each cell’s voltage, internal resistance, and capacity, then match them into consistent groups.
Tab trimming – Connect cells in series or parallel to assemble into battery packs.
Assemble battery cells – Integrate with PCB board including overcharge, overdischarge, MOS, and temperature protection.
Solder welding – Use soldering iron to heat solder wire, melt it onto target parts, and let cool for solid connection.
Install aluminum panels – Add aluminum sheet and tape to the battery pack for extra protection.
Heat shrink packaging – Wrap black and clear PVC protective film, then add label.
Weighting & aging – Test voltage and internal resistance, then perform aging test on every battery.
Package – Bubble column packaging + carton box with foam protection, ready to ship.


Beijing KNS New Energy Technology Co., Ltd. is a professional battery manufacturer dedicated to advancing the performance and safety of UAV power systems. Since our founding, we have focused on one core mission: solving the flight time challenge for drones.
Our journey began with a clear vision—to develop battery technology that could keep pace with the rapidly evolving drone industry. Today, we are proud to be at the forefront of solidstate battery innovation, delivering solutions that enable longer flights, heavier payloads, and safer operations for professionals worldwide.
We believe that true innovation is measured not only in technical specs but in the trust of our customers. That trust drives everything we do.
