This is why when Samsung begun recalling the Galaxy Note 7, the China units weren’t affected as they were supplied by ATL. Now the recall is currently underway and Samsung is working to get replacement units out as soon as possible. A report from Reuters has also revealed that these replacement units will feature batteries from ATL as Samsung will no longer be supplying their own batteries at least as far as the Note 7 is concerned.
According to Samsung, they explained that a rare manufacturing process error was the reason as to why some of the batteries made by Samsung SDI had been exploding, and we can only assume that Samsung has decided to investigate the issue further, but in the meantime have also decided that they have no choice but to go with ATL’s batteries until they can sort it out themselves.
Samsung has yet to officially confirm this, but given that ATL’s batteries don’t appear to have any issues, we guess it makes sense that Samsung would go with their components for now. This isn’t to say that Samsung won’t source from Samsung SDI ever again in the future, but just not for the Note 7.