Two years ago, Boeing, Cessna and Gulfstream were the leading edge for introducing lithium-ion main-ship batteries into new aircraft in the civil aviation market. But by late 2011, evidence had emerged that the technology was not yet mature, spurring business aircraft makers Gulfstream and Cessna to return to more traditional, lower-performance and heavier batteries for the G650 and CJ4, respectively. Boeing, however, went forward with its original choice of lithium-ion batteries for the ...


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