Swiss battery start-up BTRY AG has raised €4.9 million in an oversubscribed Seed round for its ultra-thin solid-state batteries reportedly capable of combining fast charging, extreme temperature stability, and intrinsic safety within an extremely thin format.
The round was led by Redstone VC, with participation from Bloomhaus Ventures, Linear Capital, Kickfund, Kick Foundation, and the CustomCells founders Leopold König and Torge Thönnessen as new investors. Existing investors HTGF (High-Tech Gründerfonds) and Zürcher Kantonalbank (ZKB) renewed their commitment.
“The oversubscribed round confirms strong investor confidence from experienced DeepTech and industrial backers. Working closely with this international consortium will enable us to transform world-class research into a scalable product,” said Dr Moritz Futscher, CEO and co-founder of BTRY AG.
Other recent EU-Startups reports highlight activity across the value chain: Estonia’s Jälle Technologies raised €2 million to advance battery-recycling and up-cycling materials; Sweden’s DREV yesterday secured €2.8 million to scale contamination-control solutions for battery-manufacturing facilities; and Germany’s Terra One obtained €150 million to expand grid-scale storage capacity.
While these initiatives target recycling, manufacturing efficiency, and large-scale storage respectively, BTRY AG’s work on compact, fast-charging solid-state cells addresses the opposite end of the spectrum – powering miniaturised sensors, logistics tags, and wearables.
None of the comparable 2025 EU-Startups fundings originated in Switzerland, making BTRY a distinctive national contributor within Europe’s broader push toward next-generation battery technologies.
“Potential customers are ready with their next-generation solutions, like active badges in logistics. What they need is a small, powerful, and safe battery – exactly what BTRY offers. We believe the company has not only the potential but the proof to set a new standard for high-performance energy storage and are excited to support its journey toward industrial scale,” said Mohamed Foulser, Investment Director at Redstone VC.
Founded in 2023, BTRY AG is a DeepTech spin-off from Empa and ETH Zurich developing ultra-thin solid-state lithium-ion batteries that allegedly operate safely at high temperatures, enable ultra-fast charging, and feature an exceptionally thin form factor for next-generation devices.
The company has grown into a 14-person team combining deep battery expertise, industrial scale-up experience, and strong business acumen.
BTRY’s mission is to electrify applications previously limited by the battery such as active logistics tags, high-temperature industrial sensors, MedTech applications, and light consumer electronics.
They power next-generation devices such as connected labels, wireless sensors, and wearables – applications where conventional batteries could not fit or endure.
“BTRY is a perfect example of Swiss DeepTech at its best – science-driven, bold, and globally relevant. The founding team combines deep scientific expertise with entrepreneurial grit. Their combination of material innovation and industrial scalability makes them a frontrunner in Europe’s next generation of battery companies,” said Pascal Stürchler, CEO at Bloomhaus Ventures.
By applying solid-state technology from semiconductor production to battery manufacturing, BTRY says their technology represents a leap in the global trend toward thinner, safer, and longer-lasting batteries that enable more reliable, compact, and connected devices.
According to the company, the batteries operate safely at temperatures up to 150 °C, where conventional cells fail, swell, or catch fire. Starting at just 0.1 mm thickness, they charge within one minute, directly powering wireless transmissions without additional capacitors.
Unlike large-scale energy storage for electric vehicles and grids, BTRY powers next-generation solutions such as smart connected labels, high-temperature industrial sensors, and light consumer electronics. For these high-value applications, miniaturisation and longevity of the power supply matter most.
BTRY’s manufacturing approach also achieves high sustainability standards with its solvent-free production and low material waste.
“Asia has been leading the way in battery manufacturing for decades, but innovations like BTRY’s show that Europe can compete through advanced materials and precision processes. We see strong potential for collaboration between Asian manufacturing expertise and BTRY’s pioneering solid-state technology,” said Tianyi Zhou, Principal at Linear Capital.
BTRY will use the funds to scale production to industrial roll-to-roll manufacturing, transforming its thin-film batteries into market-ready products. The company is now focusing on establishing its production set-up, advancing industrial processes, and securing offtake agreements for integration in next-generation devices.
Read the orginal article: https://www.eu-startups.com/2025/11/zurichs-btry-raises-e4-9-million-as-switzerland-enters-the-solid-state-battery-race-against-asian-dominance/
