A battery made with the tools of a chip factory

BTRY deposits every layer of a solid-state cell as a thin film on flexible metal foil. One process, one off-the-shelf production line, no liquid electrolyte.

BTRY engineer working at thin-film deposition equipment — Thin-film deposition at BTRY in Dübendorf.

Production simplified to its essence

Platform technology

One production technology powers very different applications, from smart labels to medical patches.

60% fewer process steps

Compared with traditional Li-ion production. No toxic solvents and little material waste.

Off-the-shelf equipment

All battery layers come off a single, proven, scalable line built on semiconductor equipment.

Fewer layers than a conventional cell

A conventional Li-ion cell stacks a composite cathode, a liquid electrolyte and a graphite anode. A BTRY cell replaces them with thin films on a metal foil.

Diagram comparing a conventional Li-ion cell (composite cathode, liquid electrolyte, graphite anode) with BTRY's thin-film stack (thin-film cathode and separator) — Diagram: BTRY.

What that changes

Safe operation up to 150 °C where conventional cells swell or fail. Full charge in about a minute. A cell that bends.

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From a 1 mm lab cell to an industrial line

20221 mm × 3 mm proof-of-concept cells developed at Empa.
2023First batteries fabricated on a flexible metal foil.
3/2024The first 10 cm × 10 cm battery.
8/2024First cells made on an industrial-scale production line.
2025BTRY 1S4P, the first product.

Lifecycle diagram: low-impact sourcing, solvent-free production, durable use phase, recyclable by design — Diagram: BTRY.

Sustainable along the whole value chain

Low-impact materials, solvent-free production with minimal waste, a durable cell that needs little thermal control, and recyclability planned from the start.

See the cell on your own bench

Request the BTRY ES spec sheet or a sample discussion with the team.

Request the spec sheet