Estonian energy storage start-up Skeleton Technologies has successfully closed a EUR-108-million (USD 113.6m) funding round, featuring prominent investors such as Siemens Financial Services (SFS), Japanese trading company Marubeni Corp (<a href="https://quote.jpx.co.jp/jpx/template/quote.cgi?F=tmp/e_stock_detail&MKTN=T&QCODE=8002" target="_blank">TYO:8002</a>) and Brazilian niobium producer CBMM, among others.