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The story of productive Estonian-Finnish partnership, which lasts for decades, now continues at the very edge of innovations, in AI and new energy. Estonian energy storage company Skeleton Technologies has opened a €25M manufacturing facility in Varkaus, eastern Finland, marking an expansion in the rapidly growing AI infrastructure sector, says the official press-release.
The plant will produce specialized super-batteries designed specifically for artificial intelligence data centres, which consume vast amounts of electricity. Skeleton’s technology promises to substantially cut both energy consumption and costs for these power-hungry facilities.
What makes these “super-batteries” special? Unlike conventional batteries, Skeleton’s products are based on proprietary technology, which dramatically increases energy density in supercapacitors. Think of supercapacitors as a hybrid between traditional batteries and capacitors: they can charge and discharge much faster than regular batteries while handling many more charge cycles, making them ideal for the rapid power fluctuations in data centres.
Skeleton’s SuperBattery technology is powered by CBMM’s NBXCELER™ niobium oxides, developed in partnership with CBMM, the global leader in the production and commercialization of niobium products. Niobium-based materials enhance battery safety, performance, and lifetime, enabling faster charging, longer durability, and greater reliability for demanding AI and industrial applications.
The facility opened Wednesday with both Finnish Employment Minister Matias Marttinen and Estonia’s Energy Minister Andres Sutt in attendance. Currently employing 37 people, the plant can produce 250,000 super-batteries annually, equivalent to 1 gigawatt of power capacity.
Skeleton’s ambitions don’t stop there. By 2029, the company aims to scale production eight-fold to two million units, which would create over 200 additional jobs. Finland’s regional development organization ELY supported the project with €7M in funding.
The timing is strategic: tech giants race to build AI infrastructure, the energy demands are becoming a bottleneck. Skeleton, founded in 2009, is positioning itself at the intersection of two critical challenges: supporting AI expansion while improving energy efficiency. The company is also opening a supercapacitor facility in Germany later this month, with Estonian Prime Minister Kristen Michal scheduled to speak at the launch.
