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If anything they did too much testing. There are general aviation requireme nts for lithium battery test from several organizations, electrical, mechan ical, and environmental, many called out on a per battery basis, that for y ears have been suspected of introducing inchoate defects that eventually gr ow into full blown failures. In other news, the UN is pushing through emerg ency regulation by the ICAO to limit lithium batteries carried in passenger plane cargo to 11 lbs, down from the 77 lbs they were allowed prior to the 787 fiasco.