Swiss battery start-up BTRY 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.
Redefining 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.
Mohamed Foulser, investment director at Redstone VC, says: “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.”
Comparison of conventional Li-ion and BTRY’s all-solid-state design: fewer layers, no liquid electrolyte, and an ultra-thin, safer architecture. Source: BTRY.
They operate safely at temperatures up to 150 deg 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.
Pascal Stürchler, CEO at Bloomhaus Ventures, says: “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.”
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.
BTRY’s customizable thin-film design allows flexible applications in IoT, MedTech, and consumer electronics. Source: BTRY.
Tianyi Zhou, principal at Linear Capital, says: “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.”
Editor’s note: While BTRY has not specified runtime or cycle life, thin-film solid-state batteries of this type typically last for tens of thousands of charge cycles and can power low-energy devices such as sensors or wearables for several years, thanks to their fast-charging, non-flammable, and ultra-stable design.
