A battery supplier to Samsung Electronics Co Ltd <005930.KS> said on Monday a Galaxy Note 7 smartphone that reportedly caught fire on its own in China appears to have been caused by an external factor.
Amperex Technology Limited (ATL) said it conducted a joint investigation with Samsung on the phone in question and determined the incident was not directly related to the batteries produced by ATL.
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A Samsung spokeswoman referred to ATL's statement and declined to comment further.
(Reporting by Se Young Lee and Paul Carsten; Editing by Christopher Cushing)