LeydenJar Series A · $9M raised · (2026)

LeydenJar is a Dutch deep-tech company that pioneers 100% pure silicon anodes for lithium-ion batteries. Their proprietary technology significantly increases energy density, enables faster charging, and dramatically lowers the carbon footprint of battery production. Founded in 2016 as a spin-off from TNO, LeydenJar is headquartered in Leiden with operations in Eindhoven.