KNS 400Wh/kg 6S 31000mAh 21V Semi-Solid State Battery for UAV Drones
<p>The KNS semi-solid state battery delivers industry-leading energy density of 400Wh/kg, enabling significantly longer flight times for UAV drones. With a 6S configuration, 31,000mAh capacity, and 21V nominal voltage, this high-performance power source is designed for heavy-lift drones, long-endurance missions, and demanding industrial applications. The advanced semi-solid state technology ensures enhanced safety, …
About this product
Product information from the supplier.




Model | KNS-400-31AH6S |
Voltage | 21V |
Capacity | 31000mAh |
Continuous Discharge | 3C |
Max.Discharge | 5C |
Charge | 0.5-1C |
Energy | 651Wh |
Energy density | 400Wh/kg |
217*89*68 | 192*72*67mm |
Weight | 1860g |
Plug | XT90S |
Charge Working Condition Temperature | 0℃~45℃ |
Discharge Working Condition Temperature | -10℃~55℃ |
Cycle life | 500 cycles |

The KNS 400Wh/kg semi-solid state battery is specifically engineered for high-demand UAV applications where extended
flight time, reliability, and safety are critical. It is ideal for:
Heavy-lift multirotor drones – Aerial work such as high-rise window cleaning, construction inspection, and cargo delivery.
Long-endurance mapping & surveying UAVs – Extended missions over large areas without frequent battery swaps.
Industrial inspection drones – Power line, pipeline, wind turbine, and bridge inspections requiring stable, long-duration flights.
Emergency response & search & rescue – Maximized loiter time for critical operations.
VTOL & eVTOL aircraft – High energy density for vertical takeoff and landing platforms.
By replacing conventional LiPo batteries with the KNS semi-solid state battery, operators can achieve up to 60% longer flight time per charge while maintaining the same payload weight. The advanced semi-solid electrolyte provides enhanced thermal stability and safety, making it suitable for commercial and industrial drone fleets operating in diverse environments.


Individually packed with shock-absorbing foam and anti-static materials. Fully compliant with UN38.3 for safe
air/sea transport. Express air or sea freight available. Terminal insulation and hazard labels included.

KNS operates a modern manufacturing facility spanning over 3,000 square meters, equipped with five advanced
production lines and capable of producing more than 5,000 battery units per day. Our team of over 200 dedicated
employees includes three professors and more than 20 research engineers, ensuring that every battery benefits from
deep technical expertise and rigorous quality control. We hold ISO9001:2015 certification, and our production
processes adhere to strict international standards. From raw material inspection to finished product testing, every
step is carefully managed to deliver consistent, highperformance solidstate batteries. Our factory is not just a
production site – it is the foundation of our promise to provide reliable, Agrade power solutions to drone
professionals worldwide.


Choose KNS for ultra-high energy density semi-solid state batteries that extend UAV flight time by up to 60%, backed
by safety, customization, and reliable quality.
