Rising global demand for cobalt needed for smartphone batteries has led to children in the Congo working in slave-like conditions.

Cobalt is primarily mined in the Democratic Republic of Congo in Africa, known for child exploitation and poorly enforced labour conditions.

Tens of thousands of children are being lured or forced into dangerous mine work in response to the cobalt boom.

Law experts in Australia are calling the conditions in the Congo ‘modern day slavery’ with Amnesty International campaigning for change.