Hackaday

Donut Lab's claimed solid-state battery promises exceptional specs: 400 Wh/kg energy density, 10-minute charging, 100,000 cycles, and low cost. Technical analysis reveals these claims are scientifically implausible with known battery chemistries. Carbon nanotube supercapacitors and sodium-ion configurations were evaluated but fail to match the stated specifications when accounting for complete battery systems. The company's claims about being non-capacitor-based and lithium-free further eliminate viable chemistry options, raising significant red flags about the product's legitimacy.

Investigating The Science Claims Behind The Donut Solid State Battery