Dutch battery innovator LeydenJar is set to unveil its record-breaking silicon anode technology at IFA Berlin 2025, promising a leap forward in wearable electronics.

The company claims its 100% silicon anode delivers up to 70% higher energy density compared with traditional graphite-based anodes, paving the way for thinner, lighter, and more powerful batteries.

The breakthrough could transform the design of smartwatches, fitness trackers and compact AI-enabled devices where space and efficiency are critical.

“Energy density is a bottleneck in wearable innovations,” said LeydenJar Chief Commercial Officer Evan Sanders. “With our silicon anode, we’re removing that constraint while supporting thinner and more flexible cell designs.”

Unlike conventional anodes, LeydenJar’s material is produced entirely from pure silicon using a proprietary plasma deposition process.

The approach eliminates the need for graphite, binders, or toxic solvents, while remaining compatible with existing battery production infrastructure. The company says this also allows for curved or ultra-thin cell designs without sacrificing capacity or safety.

LeydenJar is already working with leading global battery makers, with integration into next-generation consumer devices expected in the coming years.

The company recently secured €100 million (A$164 million) in funding and is building its first large-scale production facility in the Netherlands, due to open in 2027.

Visitors to IFA NEXT can see LeydenJar’s technology in action at Hall 25, Booth 141.