BTRY closes $5.7M to industrialise ultra-thin solid-state cells

Swiss battery start-up BTRY has raised $ 5.7 million in an oversubscribed seed round. 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’s thin-film solid-state batteries deliver ultra-fast charging, temperature resilience, and non-flammable safety, with performance that exceeds conventional lithium-ion cells. Drawing on solid-state techniques from semiconductor manufacturing, BTRY advances thinner, safer, longer-lasting batteries for reliable, compact, connected devices.

The cells operate safely at temperatures up to 150°C, where conventional batteries may fail, swell, or ignite. Starting at 0.1mm in thickness, they can charge in about one minute and directly power wireless transmissions without additional capacitors.

Rather than targeting large-scale storage for electric vehicles or grids, BTRY focuses on high-value applications where size and longevity are critical, such as smart connected labels, high-temperature industrial sensors, and lightweight consumer electronics. The manufacturing approach is solvent-free with low material waste, supporting high sustainability standards.

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.

The new funding will accelerate industrialisation of BTRY’s ultra-thin solid-state batteries, a category combining fast charging, extreme temperature stability, and intrinsic safety in one of the world’s thinnest formats.

The company will scale to industrial roll-to-roll manufacturing, establish production infrastructure, advance industrial processes, and secure offtake agreements for integration into next-generation devices.