“We haven’t seen a weight-based energy density figure from Natron itself, but a 2022 article from Chemical & Engineering News put its sodium-ion batteries at 70 Wh/kg, around the very bottom of the sodium-ion energy density scale.”
Natron started production in Holland, Michigan, a year behind its 2023 plan. It claims 50,000 cycles and charging 10 times faster than lithium-ion. It will not publish its own energy density, and the outside estimate is 70 Wh/kg. That is why the pitch is data center backup cabinets and not cars.