According to the Seattle Times, the fix also involves using a system of venting tubes that in case of an incident would channel any flammable vapours or liquids directly out of the plane, and continuous monitoring of the temperature and voltage of individual cells within the battery.

BBC: Dreamliner: Japan's ANA cancels more Boeing 787 flights

The materials inside these fuel cells are touchy about changes in temperature and humidity and prone to their own form of carbon monoxide poisoning.

FORBES: Pip-squeak Power Plant

Laboratory tests have shown that such events can prompt nearby cells to quickly heat up and result in a fierce, high-temperature fire engulfing the battery and anything nearby.

WSJ: All Boeing Dreamliners Are Grounded