Criminal complaint by the cofunder of Nordic Nano group (the company supposed to manufacture the battery) might be the first nail in the Donut coffin.
thepack.news
"the promised battery properties, such as energy density and charging cycles, have not been achieved. The readiness for mass production has also been misrepresented. The company does not have the promised capacity for mass production and large production volumes of batteries.”
Confirmation that CT coatings are the battery inventor, it had been independently tested just below 300 Wh/kg (pretty good but also pretty far from the advertised 400 Wh/kg)... and apparently they've stopped the development of said battery.