This light, energy-dense battery just got independently verified

Amprius Technologies (NYSE: AMPX) today announced that its high-energy, high-power lithium-ion battery with a silicon anode platform has been verified by an independent test lab.

The 500 Wh/kg, 1300 Wh/L battery’s performance was verified by Beaverton, Oregon-based Mobile Power Solutions, which checks compliance, safety, and performance. Its cell model reportedly provides >504 Wh/kg and >1321 Wh/l at 25C.

Or, to put it another way, as Jon Bornstein, president of Amprius Lab explained, the company’s battery cell provides a run time of 200% compared to graphite cells, while being lighter and smaller than other batteries with the same energy content.

Fremont, California-headquartered Amprius, which originated from a research project out of Stanford University, uses silicon nanowires instead of graphite anode in its lithium-ion batteries. That allows for higher energy density, which means Amprius’ batteries can store more energy in the same amount of space than traditional batteries.

Amprius’ battery has a customizable platform that allows customers to select the option to either increase energy content in a battery pack without increasing weight, reduce weight in applications that target a fixed energy content, or a combination of both. Higher energy is important for longer run times, range, and endurance, while lighter packs increase energy efficiency – even for the same battery energy content.

Pierre-Antoine Aubourg, CTO at AALTO HAPS, the Airbus subsidiary developing a fully solar-electric high altitude platform station for connectivity and earth observation applications, said:

Amprius is a valued current supplier with a great track record, and we are confident that Amprius’ battery will deliver the capability we need.

Earlier in March, Amprius announced that it had signed a letter of intent for a 775,000-square-foot facility near Denver. The company’s plan is to provide batteries to the aviation and, eventually, EV markets.

In October, the US Department of Energy awarded Amprius a $50 million cost-sharing grant as the result of the Biden administration’s Infrastructure Law.