Comment by rubyn00bie

Yeah, I was noticing that too. There is a company out there, Amprius, which has validated their silicon anode lithium ion batteries that can discharge at 10C (or 20C pulses), have varying densities from ~345wh/kg to 450wh/kg, and are shipping them to customers for drones and VTOLs.

I think until we have an independent lab verify the results, it's pretty much impossible to say if their (Donut Labs) claims are true or not. The only thing I'm particularly suspicious of is that they claim their battery was verified but didn't say by who or provide a whitepaper on it. Both of those seem to be the bare minimum for most battery manufacturers, and with their extraordinary claims I'd assume they'd have them front and center.