The fresh investment was backed by Ethereum co-founder Gavin Wood, MN Capital founder Michael van de Poppe, GlueNet founder Ogle, Scytale Digital, Leonard Dörlochter, and Vineet Budki.
The funding round saw support from Venture Kick.
The company is now targeting global markets as demand grows for compact, safe power sources in IoT and sensor-driven devices.
The pre-seed round was led by QBIT Capital and Haatch, with participation from Backbone Ventures and ROI Ventures.
The Series A round was co-led by 4impact capital and Elevator Ventures.
The Series D round was led by Highland Europe, with ECBF and McWin Capital Partners also participating as new investors.
The Series A round was led by BlueYard Capital, with participation from Founderful and XTX Ventures.
The seed round was led by VENPACE, with support from SixThirty Ventures, COREangels, and SICTIC.