Electronics Watch travelled to Kolwezi in the province of Lualaba, in the south of the Democratic Republic of Congo. Two worlds live side by side here, without ever crossing paths. On the one hand, the world of industrial mines, with their huge machines. On the other, the tens of thousands of "diggers" in small-scale artisanal mines, armed with a simple crowbar to exploit a mineral vein, in extremely dangerous conditions. The DRC alone has 80% of the world's cobalt stocks needed to manufacture batteries to serve the demand for electric vehicles, and no less than 30% of this stock is mined in an artisanal way. One to two million Congolese people depend on this production directly or indirectly, while world demand is booming.