17 December 2025

Amprius Technologies, Inc. a leader in next-generation lithium-ion batteries with its Silicon Anode Platform, has announced the expansion of the Amprius Korea Battery Alliance following a successful launch event in Daejeon, South Korea.

The Alliance now includes three additional contract manufacturers who join a consortium of Korean companies that contribute capabilities across the lithium-ion battery value chain, including materials, components, and production equipment. Their participation broadens Amprius’ global manufacturing network and provides direct access to Korea’s advanced battery production ecosystem, supporting the Company’s expansion into trusted allied nations.

A central objective of the Alliance is to align Amprius’ global operations with the requirements of the U.S. National Defense Authorization Act (“NDAA”). By expanding production partnerships in allied countries, Amprius is strengthening secure and compliant supply chain networks needed to serve defense, aerospace, and critical infrastructure segments.

“Deepening our partnerships in Korea enables us to scale efficiently while delivering exactly what our customers require,” said Tom Stepien, President of Amprius Technologies. “The Alliance anchors Amprius within a world-class lithium-ion battery manufacturing base and allows us to accelerate SiCore® production within an NDAA-compliant framework.”

“South Korea is a global leader in advanced battery technology, and Amprius is at the forefront of next-generation silicon anode innovation,” said Mayor Lee Jang-woo. “Expanding their partnerships in Daejeon reinforces the city’s standing as a center for energy and materials innovation, and drives new growth across the regional economy.”

With the new partners, Amprius’ contract manufacturing network now exceeds 2 GWh of global capacity. This added scale positions the Company to meet rising demand across its key markets.

The well-attended launch ceremony included Alliance members, local South Korean government officials, investors, industry experts, university researchers, and media. Discussions focused on coordinating production, integrating suppliers, and detailing short-term execution plans.

About Amprius Technologies, Inc.

Amprius Technologies, Inc. is a leading manufacturer of high-energy and high-power lithium-ion batteries, producing the industry’s highest-known energy density cells. The Company’s commercially available SiCore batteries deliver up to 450 Wh/kg and 1,150 Wh/L. The Company’s corporate headquarters is in Fremont, California, USA where it maintains an R&D lab and a pilot line for the fabrication of silicon anode cells.