BTRY Secures $5.7 Million to Industrialize Ultra-Thin Solid-State Batteries, Ushering in a New Era of Compact Energy Storage

The BTRY team is shaping the next generation of solid-state batteries — from Swiss research labs to global production. Image: BTRY

(IN BRIEF) Swiss start-up BTRY AG has secured $5.7 million in an oversubscribed seed round to industrialize its ultra-thin solid-state batteries, combining rapid charging, high safety, and temperature stability. The funding round, led by Redstone VC with support from Bloomhaus Ventures, Linear Capital, and others, will enable BTRY to scale roll-to-roll production and establish strategic partnerships for global deployment. The batteries, ideal for connected labels, sensors, and wearables, operate safely up to 150°C and charge within a minute. BTRY’s approach blends Swiss material innovation with sustainable, solvent-free production, positioning it as a leader in the next wave of European battery technology.

(PRESS RELEASE) DÜBENDORF, 6-Nov-2025 — /EuropaWire/ — Swiss-based battery innovator BTRY AG has successfully raised $5.7 million in an oversubscribed seed funding round to accelerate the industrial rollout of its ultra-thin solid-state batteries, marking a key milestone for Europe’s deep-tech energy sector. The round, led by Redstone VC, saw participation from Bloomhaus Ventures, Linear Capital, Kickfund, Kick Foundation, and CustomCells founders Leopold König and Torge Thönnessen, with renewed commitments from High-Tech Gründerfonds (HTGF) and Zürcher Kantonalbank (ZKB).

BTRY’s new generation of solid-state batteries delivers fast charging, intrinsic safety, and temperature resilience up to 150°C, packed into an ultra-thin format starting at just 0.1 mm. These attributes make them ideal for powering connected labels, wireless sensors, and wearable devices — markets that conventional batteries cannot adequately serve. The company now plans to scale up to industrial roll-to-roll production, focusing on developing manufacturing processes and securing integration partnerships for next-generation electronic products.

“The oversubscription of this round underscores the strong confidence from leading industrial and deep-tech investors,” said Moritz Futscher, CEO and Co-Founder of BTRY. “Our collaboration with this global investor network will enable us to transform cutting-edge research into scalable, market-ready products.”

BTRY’s design leverages solid-state technology from semiconductor manufacturing, reducing the need for liquid electrolytes and enabling safer, thinner, and more energy-dense cells. The batteries can fully charge in a minute, making them ideal for rapid-power applications such as industrial IoT devices. According to Mohamed Foulser, Investment Director at Redstone VC, “BTRY offers the perfect solution for customers building the next generation of connected technologies — compact, powerful, and safe.”

Comparison of conventional Li-ion and BTRY’s all-solid-state design: fewer layers, no liquid electrolyte, and an ultra-thin, safer architecture. Illustration: BTRY

The company’s sustainability credentials are also strong, thanks to solvent-free production and minimal material waste, positioning it as a European leader in eco-conscious energy innovation. Investors such as Bloomhaus Ventures and Linear Capital have highlighted BTRY’s potential to drive a “Battery Moment” in Europe, combining Swiss research excellence with scalable industrial potential.

As the global energy storage market continues to evolve, BTRY’s fusion of miniaturization, durability, and environmental responsibility could redefine how power is integrated into the smallest connected devices — from logistics tags to industrial sensors — setting a new benchmark for the future of battery innovation.

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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About the Investors

Redstone VC is a European venture capital firm following selected investment strategies. Their focused approach with specialized investment teams for each strategy has enabled them to develop strong sector expertise and networks. Redstone aims to bridge the gap between research breakthroughs and commercial success, bringing strong industrial networks and operational experience.
Linear Capital is a deep-tech investor based in Shanghai and Hong Kong, backing early-stage founders developing transformative technologies in materials science, semiconductors, and energy systems. Linear Capital emphasizes long-term partnerships and strategic guidance for deep industrial value creation.
Bloomhaus Ventures is a Swiss venture capital firm dedicated to supporting groundbreaking tech startups in Central Europe, helping them thrive on a global scale and create a more sustainable future. With experience as entrepreneurs, technologists, and investors, Bloomhaus empowers pioneers and connects them with the resources needed for long-term success.
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.
Zürcher Kantonalbank is a leading universal bank in the Zurich economic area with Swiss roots and international reach. It is an independent, incorporated public-law institution of the Canton of Zurich and has received top ratings from the rating agencies Standard & Poor’s, Moody’s and Fitch (AAA/Aaa).
Wijdefjorden is the investment company of Torge Thönnessen and Leopold König, founders of CustomCells, a leading European manufacturer of advanced lithium-ion cells. Wijdefjorden brings invaluable strategic guidance and network access to BTRY’s next growth stage.
Kickfund is a Swiss venture capital firm supporting high-potential technology start-ups emerging from the Venture Kick ecosystem. Kickfund invests in early-stage spin-offs from Swiss universities, offering capital, mentorship, and access to its extensive innovation network.
Kick Foundation – Venture Kick is an initiative from the philanthropic Kick Foundation. Since its launch in 2007, Venture Kick has supported 1’170+ Swiss startup projects with CHF 90 million from private donors. Venture Kick alumni companies have attracted investments of CHF 10+ billion.

Further information

Moritz Futscher
CEO and Co-Founder
BTRY AG
moritz@btry.ch

Editor / Media contact

Dr. Michael Hagmann
Communications
Phone +41 58 765 4592
redaktion@empa.ch

SOURCE: EMPA