LG was once the third-largest mobile phone maker but has lost market share to Chinese and other competitors.

LG Energy Solution has said it will invest more than 4. 5 billion dollars (£3. 2 billion) in its US battery production business by 2025 as car makers ramp up production of electric vehicles.

Called the PuriCare Wearable Air Purifier, LG says the device enables the user to breathe clean air both indoors and outside