Amprius Technologies has reached an agreement to boost battery cell production in the U.S. The company has been working closely with Nanotech for several months to improve its SA128 silicon-anode battery cell, which has a capacity of 6.8 amp-hours and 320 watt-hours per kilogram.
Amprius is based in Fremont, California, where it has a pilot facility. Until now, the company has relied on contract manufacturers located outside the U.S., according to a filing from November 2025. The new partnership with Nanotech will allow Amprius to meet growing demands from the defense, aerospace, and other key industries, especially as new regulations under the National Defense Authorization Act (NDAA) come into effect in 2026.
The NDAA, starting January 1, 2028, will stop the U.S. Department of Defense from purchasing batteries for weapons and support systems made from materials from foreign countries, like China or Russia. This change is important for Amprius, as it works with defense clients such as AeroVironment, L3Harris Technologies, and Teledyne Flir.
The partnership with Nanotech is expected to help Amprius meet these new requirements faster, giving them a head start on complying with the NDAA’s new rules. Former CEO Kang Sun mentioned that they have already seen strong interest from the defense market and expect even more demand from these customers in the coming year.
Executive Statement
According to Former CEO Kang Sun, they have already experienced strong traction from the defense market and expect growing interest from these customers in the year ahead.