SEOUL, South Korea —
Samsung Electronics Co. said Monday that problems with the design and manufacturing of batteries in its Galaxy Note 7 smartphones caused them to overheat and burst into fire.
The announcement of results from the company’s investigation into one of its worst product fiascos comes three months after the flagship phone was discontinued.
Seven-hundred researchers and engineers tested more than 200,000 devices and more than 30,000 batteries and replicated what happened with the Note 7 phones, the world’s biggest smartphone maker said in a statement.
Samsung faulted design and manufacturing errors in two different battery types by two different manufacturers.
A highly technical explanation of the various problems boiled down to the relatively large batteries not fitting well into the phones, and not enough insulating material inside.
