LeydenJar teams up with Chinese battery producer Highpower

LeydenJar, a Dutch clean-tech building 100% silicon anode technology, teams up with Highpower Technology, a Chinese battery manufacturer. Highpower specializes in designing and mass-producing advanced lithium-ion cells. By combining LeydenJar’s silicon anodes with Highpower’s cell design and manufacturing capabilities, the two companies aim to produce a new generation of batteries with ultra-high energy density. These high-capacity batteries will power new small fitness trackers and smart devices with AI functionalities.

LeydenJar develops the critical silicon anode while Highpower integrates it into advanced cell designs and prepares them for large-scale production. The collaboration not only bridges innovation with industrial-scale manufacturing but also enables better customer feedback through Highpower’s global customer base, allowing the technology to be validated and improved in close cooperation with leading consumer electronics brands. With AI now driving demand for more powerful and energy-hungry devices, the parties are positioned to meet the requirements of next-generation AI-enabled consumer electronics. 

Delivering energy density

Modern consumer electronics demand batteries that are smaller, lighter, and longer-lasting, while powering increasingly sophisticated features. According to LeydenJar, the collaboration is driving the performance beyond what conventional lithium-ion technology can achieve. LeydenJar’s 100% silicon anodes store significantly more energy than standard graphite anodes, increasing energy density and battery capacity by at least 50%. Highpower’s advanced cell design and manufacturing expertise ensure that this additional capacity is delivered reliably, with stable cycle life and safety, at scale.

In the laboratory, LeydenJar’s cells have already demonstrated 500 cycles without any external compression. The companies are now translating these results into production-ready cells, targeting an energy density up to 1350 Wh/L (nominal stack level). The companies have already shipped thousands of prototype cells built on a pre-production assembly line to major consumer electronics customers. 

Christian Rood, CEO of LeydenJar, said: “We are no longer talking about possibilities. We are producing thousands of cells together and delivering them to leading consumer electronics companies. By combining our 100% silicon anodes with Highpower’s manufacturing expertise, we are already demonstrating record energy density and performance in real devices. This collaboration proves that next-generation batteries are not just on the horizon. They are here now.”

To scale these results, LeydenJar and Highpower are validating 100% silicon anodes in Highpower’s manufacturing lines and developing high-volume production technologies. With LeydenJar’s Eindhoven manufacturing facility, PlantOne, full-rate production of battery cells starts in 2027.

Leo Liao, CTO of Highpower, commented: “Energy density will define the future of consumer electronics, with AI’s heavy power requirements pushing the limits of today’s devices. By applying LeydenJar’s 100% silicon anodes in our advanced cell architecture, we are achieving breakthrough Wh/L levels without compromising cycle life or safety.”