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Boeing had numerous reliability issues with the main batteries on its 787 Dreamliner long before the two battery incidents this month grounded the entire fleet.

More than 100 of the lithium-ion batteries have failed and had to be returned to the Japanese manufacturer, according to a person inside the 787 program with direct knowledge.

The frequency of battery failures reflects issues with the design of the electrical system around the battery, said the person on the 787 program.

Read more at The Seattle Times

Copyright:The Seattle Times

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