https://www.reuters.com/article/us-tesla-cuba-cobalt-exclusive/exclusive-teslas-battery-maker-suspends-cobalt-supplier-amid-sanctions-concern-idUSKBN1K92Q9

Panasonic said it was unable to determine how much of the cobalt used in batteries it makes for Tesla cars comes from Cuba, a country subject to U.S. sanctions, and that it had suspended relations with a Canadian supplier as a result of its concerns.