Amprius batteries power first stratospheric flight for BAE Systems drone
Amprius batteries supported PHASA-35 stratospheric flight demonstration following joint electric-product cooperation with BAE Systems.

Evidence notes
- Amprius batteries powered the first stratospheric flight of BAE Systems' PHASA-35 high-altitude drone.
- The flight followed a 2022 cooperation agreement between Amprius and BAE Systems for electric products under development by BAE Systems.
Company context
Amprius Technologies develops high-energy-density silicon-anode lithium-ion batteries for aviation, mobility, robotics and other high-performance applications. Its robotics relevance comes from power systems used to extend endurance, reduce charging frequency and support higher-duty-cycle unmanned and robotic platforms.