Amprius Technologies Selects Colorado for Gigawatt-Hour Scale Factory Site. Amprius’ silicon anode battery cell provides a fast charge capability of an 80% charge in just 6 minutes, while its battery packs have been used in aircraft and unmanned aerial systems (drones) as well as satellites of the U. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this