Samsung recalled Galaxy Note 7 smartphones worldwide in 2016 because their lithium-ion batteries could catch fire.
The original batteries, supplied by Samsung SDI and another manufacturer, could develop internal short circuits caused by manufacturing and design issues. Some phones overheated or caught fire while charging, prompting airlines and regulators to warn passengers not to use or transport the device on aircraft.
Samsung first recalled the phones and issued replacement units with batteries from a different supplier. When some replacement devices also overheated, the company ended production and permanently recalled the entire model. It later said battery defects were the root cause.
The Galaxy Note 7 recall became one of the most prominent consumer-electronics recalls. Samsung introduced expanded battery testing afterward, including several safety checks intended to prevent similar failures in future devices.