Field Visit to LeydenJar: from lab to factory

This is the very first field visit Carbon Equity is organising, and we're excited that it takes us to a Dutch hardware company from our own portfolio. Not a presentation from a distance, but an evening on site: you'll hear the story straight from the founder and see with your own eyes how the technology is made.

About LeydenJar

LeydenJar is rethinking what goes inside the battery. For years, silicon was seen as too fragile to use in batteries, but LeydenJar found a way to make it work. By replacing a key part of the battery with pure silicon, batteries can hold significantly more energy without getting any bigger: think of a phone or laptop that lasts much longer on a single charge. LeydenJar starts with everyday devices like smartwatches, phones and laptops, with electric cars as the next step.

To bring this to market, LeydenJar turned a former Philips factory in Eindhoven into its own production site, PlantOne. Commercial production starts in early 2027, with enough output each year for around four million smartphone batteries. That makes this visit special: you'll get an exclusive look inside before the factory is in full production.

How and where did it all start? How do you build a hardware company that grows from an idea in the lab into its own factory? And what choices do you face along the way?

Christian will also share his vision on Europe's place in a battery market largely dominated by China. What does it take for a European company to win a unique position?

After the presentations, we'll tour the production hall and wrap up with drinks and bites: the perfect moment to network and continue the conversation.