"ONE uses lithium-iron-phosphate, or LFP batteries, which are cheaper and less fire-prone than nickel-based chemistries. Typically, that approach would mean sacrificing power and range for stability, but the startup claims it’s solved that problem."

Apple veteran wins Gates’s backing for Michigan battery startup - MINING.COM

"ONE’s analysis showed its packs are made up of 76% cells and yield 287 watt-hours per liter (Wh/L) of energy density. By comparison, the analysis showed the pack from a Tesla Model 3 using LFP chemistry was made of 49% cells and yielded 173 Wh/L."