Amprius Strengthens U.S. Manufacturing Footprint With Strategic Silicon Anode Battery Partnership
Amprius Establishes Strategic U.S. Manufacturing Partnership to Advance Silicon Anode Battery Production
Amprius Technologies, Inc., a recognized leader in next-generation lithium-ion batteries powered by its proprietary Silicon Anode Platform, has announced a strategic manufacturing partnership with Nanotech Energy, a U.S.-based energy company specializing in the development and production of advanced lithium-ion battery cells. This collaboration represents a significant milestone for Amprius, as it secures a reliable domestic manufacturing pathway for its high-performance silicon anode battery cells and reinforces the company’s long-term growth and supply chain resilience strategy.
Strengthening Domestic Manufacturing and Supply Chain Security
Nanotech Energy becomes Amprius’ first U.S.-based manufacturing partner, a move that meaningfully strengthens the company’s ability to support customers operating in defense, aerospace, and other mission-critical sectors. These industries increasingly require secure, traceable, and compliant domestic supply chains, particularly as regulatory and geopolitical considerations continue to influence sourcing decisions. By establishing U.S. production capacity, Amprius can better align with customer expectations for reliability, security, and compliance while reducing dependence on overseas manufacturing alone.
Alignment With U.S. Defense and Compliance Requirements
The partnership closely aligns with the updated requirements outlined in the National Defense Authorization Act (NDAA), which emphasizes domestic sourcing and trusted supply chains for components used in national security programs. Through this collaboration, Amprius gains the ability to scale production of its industry-leading silicon-anode battery cells within the United States, ensuring compliance with stringent regulatory frameworks while supporting defense and aerospace programs that demand both exceptional performance and secure domestic manufacturing.
Executive Perspective on Strategic Importance
Tom Stepien, Chief Executive Officer of Amprius, emphasized the importance of establishing a U.S. manufacturing partner as customer requirements evolve. He highlighted that Nanotech Energy brings deep experience in developing and manufacturing advanced lithium-ion cells, making the partnership particularly valuable. By combining Nanotech’s manufacturing expertise with Amprius’ industry-leading silicon anode designs, the companies are positioned to move efficiently from development to scaled production while maintaining the quality, security, and performance standards expected by Amprius’ customers across critical industries.
Nanotech Energy’s Role in Building U.S. Battery Manufacturing
Curt Collar, Chief Executive Officer of Nanotech Energy, underscored that the company was built specifically to enable and support the domestic battery cell industry. He noted that the partnership with Amprius is grounded in two core principles: deep technical capability and high trust. Nanotech Energy expressed pride in supporting the scaling of U.S. manufacturing for Amprius’ field-validated silicon anode cells, which are already seeing strong demand from customers. Together, the companies aim to design and produce battery cells that play a vital role in the future of American energy storage and national infrastructure.
Validation From Mission-Critical Customers
The strategic value of the partnership is further reinforced by Amprius’ customer base, which includes organizations such as L3Harris Technologies. L3Harris delivers end-to-end technology solutions across space, air, land, sea, and cyber domains, serving the needs of national security and defense operations. The presence of such customers highlights the importance of secure, high-performance battery solutions and underscores why domestic manufacturing capabilities are increasingly essential for suppliers operating in these sectors.
Advancing the SA128 Silicon Anode Cell
Over recent months, Amprius and Nanotech Energy have worked closely to refine both the design and manufacturability of the Amprius SA128 silicon-anode battery cell. This collaborative development effort has focused on ensuring that the cell’s advanced performance characteristics can be reliably reproduced at scale within a domestic manufacturing environment. The SA128 cell features a 21700 cylindrical format, a capacity of 6.8 ampere-hours, and an energy density of approximately 320 watt-hours per kilogram, positioning it among the highest-performing lithium-ion cells currently available for demanding applications.
Supporting a Manufacturing-Light Business Model
The addition of U.S.-based contract manufacturing further strengthens Amprius’ manufacturing-light strategy, which is designed to enable rapid scaling without the need for heavy capital investment in owned facilities. By leveraging trusted partners across Asia and now the United States, Amprius extends its global manufacturing footprint while maintaining flexibility and speed. This approach increases the company’s total global manufacturing capacity beyond 2.0 gigawatt-hours and positions it to respond efficiently to rising demand across commercial, industrial, and defense markets.
Expanding Reach Across Commercial, Industrial, and Defense Markets
With domestic manufacturing now secured, Amprius is better equipped to serve a wide range of customers requiring high-energy and high-power battery solutions. Commercial and industrial customers benefit from improved supply chain resilience and reduced lead times, while defense and aerospace customers gain confidence in a trusted U.S. supply source that meets compliance and security standards. This expanded capability strengthens Amprius’ competitive position as demand accelerates for advanced energy storage solutions capable of supporting next-generation platforms.
Amprius’ Technology Leadership in Silicon Anode Batteries
Amprius Technologies is widely recognized for its leadership in advanced lithium-ion battery technology, delivering silicon anode cells that offer up to twice the energy density, range, and operational endurance compared with conventional graphite-based batteries. Headquartered in Fremont, California, the company operates a dedicated research and development laboratory and a pilot manufacturing facility focused on silicon anodes and advanced cell designs. Its technology portfolio supports applications where energy density, power, and reliability are critical differentiators.
Commitment to Scalable and Capital-Efficient Growth
To support scalable production, Amprius employs a contract manufacturing strategy that allows it to expand capacity quickly while maintaining capital efficiency. This approach enables the company to focus resources on innovation, cell design, and customer engagement while leveraging the manufacturing expertise of established partners. The partnership with Nanotech Energy exemplifies this strategy, combining Amprius’ cutting-edge technology with Nanotech’s domestic production capabilities.
Nanotech Energy’s Manufacturing Capabilities
Nanotech Energy, Inc. is a U.S.-based advanced energy storage company dedicated to the domestic development and production of high-performance lithium-ion battery cells. Operating a manufacturing facility in California, Nanotech has been producing and shipping both 18650 and 21700 cylindrical cells since late 2024 for commercial and industrial customers. The company integrates proprietary materials science with scalable manufacturing processes to deliver reliable, American-made battery solutions tailored to next-generation energy storage needs.
Looking Ahead to the Future of Domestic Battery Production
Together, Amprius and Nanotech Energy aim to play a meaningful role in strengthening the U.S. battery manufacturing ecosystem. By combining advanced silicon anode technology with domestic production expertise, the partnership supports national objectives around energy security, supply chain resilience, and technological leadership. As demand grows for high-performance batteries across aerospace, defense, mobility, and industrial sectors, the collaboration positions both companies to contribute to the future of American energy innovation.
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