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Donut Lab releases world-first all-solid-state EV battery

Tamara Birch, senior writer, The Eco Experts
Written By
Maximilian Schwerdtfeger
Reviewed By
Published on 28 January 2026
  • The Donut Battery from Donut Lab is made entirely from abundant, affordable and geopolitically safe materials
  • The solid state battery delivers 400Wh/kg of energy density to enable longer range
  • The Donut Battery can be produced in custom sizes, voltages, and geometries to enable structural integration
Donut Battery
The Donut Battery experiences minimal capacity fade over its lifetime. Credit: Donut Lab

British battery experts Donut Lab have launched the world’s first solid state electric vehicle (EV) battery, which it claims offers faster charging times, and more energy density, as well as being safer.

The solid state battery, according to Marko Lehtimäki, CEO, Donut Lab, delivers 400Wh/kg of energy density to enable longer range, lighter structures and flexibility in both vehicle and product design. 

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It can also be charged to full in just five minutes without limiting charging to 80%, and supports full discharge safely, repeatedly and reliably. 

Lehtimäki said that unlike conventional lithium-ion batteries, the Donut Battery experiences minimal capacity fade over its lifetime, with a design life of up to 100,000 cycles, offering practical longevity that far exceeds existing technologies. 

“Safety is built in at the core,” he claimed. “No flammable liquids, electrolytes, no thermal runaway chains and no metallic dendrites, which eliminates the root causes of battery fires, making the Donut Battery extremely safe and truly revolutionary.”

The Donut Battery is made entirely from affordable and safe materials, meaning it does not rely on rare or sensitive elements, the company claims. Lehtimäki describes the Donut Battery as “a universal, general-purpose platform” that is “ready to power the next generation of technology”.

The Donut Battery can be produced in custom sizes, voltages, and geometries to enable structural integration and non-traditional formats, like serving as the body of a drone or a vehicle chassis.

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Written By

Tamara Birch, senior writer, The Eco Experts

Tamara is a journalist with more than six years experience writing about environmental topics. This includes advising small businesses on cost-effective ways tom become more sustainable, from installing to solar panels and heat pumps and reducing waste. She has used her journalist and research skills to become highly knowledgeable on sustainable initiatives, issues, and solutions to help consumers do their bit for the environment – all while reducing monthly costs. Now, she’s using this experience to advise homeowners on the benefits of installing low-carbon technologies. She is also qualified in offering innovative initiatives to improve sustainability practices in businesses, from advertising to marketing and publishing.

Her passion for sustainability and eco-friendly solutions stems from a long obsession with nature and animals and ensuring they feel looked after. In her free time, Tamara enjoys reading fantasy novels, visiting the gym, and going on long walks in new areas.

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Reviewed By

Maximilian Schwerdtfeger

Max joined The Eco Experts as content manager in February 2024 and became deputy editor in 2025. He has written about sustainability issues across numerous industries, including maritime, supply chain, finance, mining, and retail. He has also written extensively for consumer titles like City AM, The Morning Star, and The Daily Express.

In 2020, he covered in detail the International Maritime Organisation’s (IMO) legislation on sulphur emissions and its effects on the global container shipping market as online editor of Port Technology International.

He also explored the initiatives major container ports and terminals have launched in order to ship vital goods across the world without polluting the environment.

Since then, he has reported heavily on the impact made by environmental, social, and governance (ESG) practices on the supply chain of minerals, with a particular focus on rare earth mining in Africa.

As part of this, in 2022 Max visited mines and ports in Angola to hone in on the challenges being faced by one of the world’s biggest producers of rare earth minerals.

His most recent sustainability-related work came much closer to home, as he investigated the eco-challenges faced by independent retailers in the UK, specifically looking at how they can cut emissions and continue to thrive.

Max lives in South London and is an avid reader of books on modern history and ghost stories. He has also recently learned to play the game Mahjong and takes every opportunity to do so. He is also yet to find a sport he doesn’t enjoy watching.

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