batteries

Samsung operating profit plunges

Samsung's operating profit plunged 60% in the first quarter, as the South Korean technology company grapples with the delayed launch of its troubled Galaxy Fold phone and waning demand for its memory chips.

Carmakers, tech struggle to keep batteries from child labor

Car and tech companies are scrambling for supplies of cobalt, a mineral they need to power electric vehicles and smartphones. But they have a problem: Much of the cobalt used in lithium-ion batteries comes from a country where children work in mines.