FILE PHOTO: An employee works at a production line of lithium ion batteries inside a factory in Dongguan, Guangdong province, China October 16, 2018. Picture taken October 16, 2018. REUTERS/Joyce Zhou/File Photo
FILE PHOTO: An employee works at a production line of lithium ion batteries inside a factory in Dongguan, Guangdong province, China October 16, 2018. Picture taken October 16, 2018. REUTERS/Joyce Zhou/File Photo