Amprius Secures $75 Million Defense Grant to Produce Advanced Drone Batteries

Amprius Technologies won a U.S. Department of War grant of up to $75 million to convert an existing domestic electric-vehicle battery production line into a facility making high-energy-density cells for Group 1–3 drones. The project is expected to cost about $100 million, including investments from Amprius and its South Korean manufacturing partner, and to be completed by early 2028 with annual capacity of up to 12 million cells. The effort is intended to expand U.S. production of advanced batteries and supply cells that meet domestic sourcing requirements under the National Defense Authorization Act.
Amprius CEO Tom Stepien said the grant is intended to establish “a primary source of domestic, NDAA-compliant battery production,” adding that the company’s technology and its South Korean partner’s U.S. manufacturing capabilities could accelerate adoption of standardized, high-performance pouch cells.
Amprius said the new production line will expand its existing contract-manufacturing relationships and help supply NDAA-compliant pouch cells to key customers at scale.
The U.S. facility will complement Amprius’s existing manufacturing network in China and South Korea, giving the company production operations across all three countries.
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