Nanotech Energy becomes Amprius U.S. manufacturing partner for SA128 cells
Nanotech Energy and Amprius established a domestic manufacturing path for Amprius silicon-anode cylindrical cells.

Evidence notes
- The partners refined a 21700-format SA128 cell rated at 6.8 Ah and 320 Wh/kg.
- Nanotech Energy is Amprius’s first U.S.-based manufacturing partner for these high-performance cells.
- The programme serves defense, aerospace and other mission-critical applications that require a domestic production chain.
Company context
Nanotech Energy develops graphene-enabled lithium-ion cells and battery materials and operates U.S. manufacturing capacity. It is a contract-manufacturing partner for Amprius silicon-anode cells used in high-energy aviation, drone and mobility applications.