It is a key ingredient in lithium batteries. More than 70% of the world's cobalt is produced in the DRC and 15%-30% of that is produced by artisanal (informal) and small-scale mining. China is the leading foreign investor — it owns some 72% of the DRC's active cobalt and copper mines, including the Tenke Fungurume Mine — the world's fifth-largest copper mine and the world's second-largest cobalt mine. China's CMOC Group is the world's leading cobalt mining company. It could produce up to 70,000 tonnes, thanks to the new Kisanfu mine.