BTRY Raises $ 5.7 Million to Industrialize Ultra-Thin Solid-State Cells
The Next Battery Moment
Oversubscribed funding round led by Redstone VC with participation from European and Asian investors to realize roll-to-roll manufacturing and successful product integration.
Dübendorf, Switzerland, November 06, 2025
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 thinfilm 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 nextgeneration 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 worldclass 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 nonflammable 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.
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.
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.
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