Ligna Energy AB is a Swedish developer and manufacturer of ultrathin, bio-based supercapacitors for connected electronic devices. Founded in 2018 as a spin-off from Linköping University, the company is headquartered in Norrköping, Sweden, and has been focused on its core product area, the S-Power supercapacitor range, since 2021.

Ligna's supercapacitors are designed to replace or complement conventional batteries in low-power wireless electronics, offering an ultra-thin, flexible, and non-toxic alternative free from lithium and PFAS. The technology combines high cycle life, low ESR, and compatibility with energy harvesting sources such as solar, NFC, and indoor light, making it well suited for applications including electronic shelf labels, smart cards, asset trackers, and indoor sensors.

Ligna Energy is committed to revolutionizing the wireless electronics industry by enabling sleek, environmentally friendly product designs that meet tightening global sustainability and battery regulations. The company develops, sells, and delivers its components to B2B customers worldwide, with current commercial focus on Europe, North America, and East Asia.