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>Even tough Tesla Motors’ battery cells are made using cobalt for the cathode, the company is not named in the report because its main battery cell supplier, Panasonic, sources its cobalt from the Philippines and not Congo.

https://electrek.co/2016/01/19/automakers-battery-makers-cobalt-child-labor/

もっと新しい記事だと
>Panasonic is also supplied with cobalt chemicals by Sumitomo Metal Mining Co Ltd (5713.T), which produces most of its material in the Philippines, the sources said.

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