approximately two days after the invention of the gasoline-equivalent battery, all manufacturers of combustion engines will be bankrupt, and oil demand will freefall to the level comsumed by industry for plastics and such.

Yeah, because the battery / electric car manufacturing capacity will be built overnight worldwide, as well as the electricity distribution infrastructure for charging these batteries . And all the world's car owners will buy a brand new electric car within a week, too...

"Ce qui vient au monde pour ne rien troubler ne mérite ni égards ni patience." René Char