| http://www.w3.org/ns/prov#value | - The short-circuiting and thermal runaway spread to the battery's other cells, igniting the fire.Investigators are trying to determine whether the root cause of the incident was a problem related to the charging of the battery, the battery's design or its manufacture, NTSB Chairwoman Deborah Hersman told reporters last week.The board also is working with Japanese authorities, who are leading the in
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