GoKawiilIn January, a Finnish-Estonian startup proclaimed it had developed a truly solid state battery, a holy grail for the technology industry. Donut Labs’ cell wasn’t just solid state, however. It claimed it was made from cheap and easily available materials, would charge to full in a few minutes and last for hundreds of years. If real, such a device would change the face of the world, which is why plenty of people don’t think it is. And, as the company makes more effort to demonstrate it is telling the truth, the more holes people are finding to poke their fingers into. So, what the hell is going on with Donut Labs’ battery? After many weeks of research, I’m throwing my hands in the air, tired of the endless dog and pony show the company is putting on.
Solid state batteries
Conventional batteries have improved a lot in the last few decades but remain imperfect in many ways. Cells found in electronics and EVs commonly use liquid or gel polymer as an electrolyte. These electrolytes are the cause of thermal runaway, where the heat of a battery increases exponentially, and can become a primary cause of battery failure and fire. Plus, they’re pretty fussy, requiring a consistent temperature for peak performance and to be treated pretty delicately. It’s why the industry has raced to develop a solid state battery that eliminates the liquid or gel polymer.
Because of their higher energy density, solid state batteries should be lighter and smaller per watt than conventional batteries. These benefits would be enjoyed widely but are vital for an EV where weight and size dictate so much of how it operates. Solid state batteries are at far less risk of thermal runaway, and should work in a much wider temperature window. Now, we are already seeing plenty of semi-solid batteries coming into the market, with fully-solid cells expected in the near future. Chinese battery giant CATL told BatteriesNews at the end of 2025 that its first small-scale production of solid state batteries is anticipated to begin in 2027. However, those first production runs are likely to be limited rather than global rollouts.
Donut Lab
Enter Donut Lab. The startup is a subsidiary of Finnish motorcycle maker Verge Motorcycles, famous for its Tron -style hubless (in-wheel) rear-wheel motor . Verge says it has built the “world’s most powerful electric motor family,” and that it made “all the components needed to build an electric vehicle.” Verge’s motors have since been incorporated into Longbow Motors’ recently announced Speedster EV.
At CES 2026, Donut Lab announced it had built the world’s “first full all-solid-state battery.” It said this wasn’t just a prototype, but was “ready to power up production vehicles now.” In a glossy promotional video, the company said it had solved the issues the whole industry had been working to solve for decades. There was nothing but upside, with none of the trade-offs its competitors had been forced to make while developing their own solid state batteries. And, it was ready to be incorporated into EVs starting today. Verge Motorcycles announced it would add the battery into its TS Pro, with shipments expected to begin Q1 2026.
Donut Labs’ battery
The company’s extensive list of claims begins by saying the cell has an energy density of 400Wh per kilogram, roughly twice the energy density of the best lithium ion battery on the market. Right now, you should expect to get around 1,000 charge and discharge cycles out of any half-decent battery. Donut Labs is promising its cell will last for a whopping 100,000 cycles, even if you’re fast-charging the cell. The company promises users will be able to reach an 80 percent charge from zero in around five minutes, and get to full in under six. Donut said the cell offers a “clay-like” freedom of design, adapting to the specific needs of a specific product, rather than the other way around.
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