A top Japanese transport safety official said the battery damage on an All Nippon Airways (ANA) Boeing 787 that made an emergency landing last week was not the result of overcharging. That assessment reverses a previous opinion from a Japanese investigator that the lithium ion battery’s 32-volt limit was exceeded. But it corresponds with US National Transportation Safety Board findings on a damaged lithium ion battery from the Japan Airlines (JAL) 787 that caught fire in Boston ...

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