Major tech companies could be buying electronic components made from minerals mined by children, according to a report from Amnesty International that was published Monday.
Researchers of the report found that dozens of firms, including Apple (AAPL, Tech30), Microsoft (MSFT, Tech30), and Samsung, may have links to at least one company which sources its cobalt supply to "artisanal" or subsistence mines in the Democratic Republic of Congo.
Cobalt is a key element used in lithium-ion batteries. Most consumer devices -- from smartphones and laptops, to self-balancing scooters and Tesla's home battery -- use this kind of power source. The DRC supplies much of the world's cobalt. Read more on money.cnn.