The Next Battery Moment: BTRY Raises $5.7 Million to Industrialize Ultra-Thin Solid-State Cells

Swiss battery start-up BTRY AG has raised $5.7 million in an oversubscribed seed round. The funds will accelerate the industrialization of its ultra-thin solid-state batteries – a new category of energy storage combining fast charging, extreme temperature stability, and intrinsic safety in one of the world’s thinnest formats. They power next-generation devices such as connected labels, wireless sensors, and wearables — applications where conventional batteries could not fit or endure.

The round was led by Redstone VC, a European deep-tech venture capital firm, 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, reinforcing confidence in BTRY’s technology and market potential.

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.

“The oversubscribed round confirms strong investor confidence from experienced deep-tech 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.

From Lab to Line: Solid State Redefines Li-Ion Battery Performance

BTRY’s thin-film solid-state batteries combine ultra-fast charging, temperature resilience, and non-flammable safety, outperforming today’s lithium-ion cells. By applying solid-state technology from semiconductor production to battery manufacturing, BTRY represents a leap in the global trend toward thinner, safer, and longer-lasting batteries that enable more reliable, compact, and connected devices.

“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.

They 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.

“BTRY is a perfect example of Swiss deep-tech 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.

“In just two years, BTRY has moved from prototypes to repeatable production and clear customer use cases. The combination of deep materials science and manufacturing excellence is truly rare. We’re proud to have backed this exceptional team from the very beginning and are excited to continue supporting them as their scientific breakthroughs translate into real industrial impact and scale,” adds Timo Bertsch, Investment Manager at HTGF.

The Next Battery Moment: Small, Sustainable, and Strategic

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, miniaturization 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. Backed by an international group of investors uniting deep-tech expertise and industrialization know-how, BTRY is driving the next Battery Moment: scalable, high-end energy storage developed in Switzerland and built for global impact.

“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.

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About BTRY
BTRY AG is a deep-tech spin-off from Empa and ETH Zurich developing ultra-thin solid-state lithium-ion batteries that operate safely at high temperatures, enable ultra-fast charging, and feature an exceptionally thin form factor for next-generation devices. Founded in 2023, 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.

Follow us: https://www.linkedin.com/company/btry-ag

Contact
Moritz Futscher
moritz@btry.ch

About HTGF – High-Tech Gründerfonds
HTGF is one of the leading and most active early-stage investors in Germany and Europe, financing startups in the fields of Deep Tech, Industrial Tech, Climate Tech, Digital Tech, Life Sciences and Chemistry. With its experienced investment team, HTGF supports startups in all phases of their development into international market leaders. HTGF invests in the pre-seed and seed phase and can participate significantly in further financing rounds, since 2024 with the HTGF Opportunity growth fund. HTGF has a fund volume of over 2 billion euros. Since its inception in 2005, HTGF has financed around 800 startups and successfully sold shares in 200 companies.
The Federal Ministry for Economic Affairs and Energy, KfW Capital and numerous companies are invested in the HTGF seed funds. Investors in the HTGF Opportunity growth fund include the ERP Special Fund and KfW with the resources of the Zukunftsfonds (“Future Fund”). Further information can be found at HTGF.de or on LinkedIn and on the Zukunftsfonds page. 

Media contact 
High-Tech Gründerfonds Management GmbH 
Tobias Jacob, Senior Marketing & Communications Manager  
T.: +49 228 – 82300 – 121 
t.jacob@htgf.de