LeydenJar develops and produces 100% silicon anodes, enabling up to 70% higher energy density in lithium-ion cells. This breakthrough enables thinner, lighter, and longer-lasting batteries - a perfect fit for the compact demands of next-generation wearable devices. Backed by over €100 million in funding, LeydenJar is partnering with leading cell manufacturers to scale production and integrate the technology into commercial products. Its first large-scale production facility is under construction in the Netherlands, positioning LeydenJar as a key enabler of high-performance, energy-efficient wearable innovation.