QuoteIn 2022, DARPA SBIR-funded Influit Energy announced a nonflammable, surface-modified nanoelectrofuel made of a metal oxide suspended in an aqueous solution. The material does not settle out of the solution, even at high concentration and features and energy density higher than Lion batteries. Operating temperatures are -40 to 80 °C.
At work I read the advertising on our products. Somebody sits around thinking of product advantages that are fabricated yet true. Like
QuoteIt fits in your pocket.So it does not use lithium, suggesting giant toxic ponds may not be mandatory for our consuming asses. Or heavy metals.

Good to know.
So what metal do they use?
Inquiring minds want to know. But who inquires?