Many connected devices are constrained by batteries that are too bulky, slow to charge, or risky under heat and stress, limiting product design, reliability, and deployment at scale. BTRY targets this gap with ultra-thin solid-state lithium-ion batteries that start at 0.1 mm, charge in under a minute, and keep working up to 150°C without swelling, leaking, or igniting, enabling smaller, safer devices that can operate in harsh environments.
To move from lab-proven technology to industrial production, BTRY raised an oversubscribed $5.7 million seed round led by Redstone VC with participation from Bloomhaus Ventures, Linear Capital, Kickfund, Kick Foundation, and the CustomCells founders.
At the same time, HTGF and Zürcher Kantonalbank renewed their backing to accelerate roll-to-roll manufacturing and customer integration programs.
Bringing ultra-thin solid-state batteries to market
Founded in 2023 as a spin-off from Empa and ETH Zurich, BTRY is led by Dr Moritz Futscher and Abdessalem Aribia, and combines battery science, industrial scale-up, and business execution, with about 14 employees as it ramps up operations in Switzerland.
Futscher told TFN, “When Abdessalem Aribia and I founded BTRY, we shared the conviction that batteries should no longer limit innovation. Together with our growing team, we have turned years of research into a scalable technology that combines safety, performance, and ultra-thin design.”
BTRY builds thin-film solid-state batteries using vacuum deposition and semiconductor-derived process steps, stacking cells into customizable formats while maintaining safety and performance at very small thicknesses. The products combine three hard-to-achieve traits, including ultra-fast charging, temperature resilience to 150°C, and non‑flammable safety, allowing devices to transmit wirelessly without extra capacitors and to survive conditions that cause conventional cells to fail.
Compared with Ilika, Enfucell, or The Batteries, BTRY’s approach emphasises extreme thinness, rapid charge, and safe high‑temperature operation, while leveraging off‑the‑shelf semiconductor equipment to enable solvent‑free, low‑waste, scalable production in Europe.
What’s next?
The seed funding supports the transition to roll‑to‑roll manufacturing and market‑ready products, positioning the company to scale deployments across high‑value applications where battery size, safety, and reliability are mission‑critical.
With investor support and a focused team, BTRY aims to set a new benchmark for thin solid‑state performance and establish a European manufacturing foothold for next‑generation micro‑power solutions.
“Asia has long dominated large-scale battery manufacturing. But companies like BTRY prove that Europe can compete by innovating in materials science and precision processes,” said Tianyi Zhou, Principal at Linear Capital.
