Re: "The internal combustion engine" [...] is designed to use fossil fuels
jmch
"Hydrocarbons have a far higher energy density than even the best batteries . . ."
Which is why they are such a superlative fuel source and the dominant one.
The question is whether battery technology will advance to such a stage that they can, once you consider the reduced weight of electric motors vs an engine and all the guff that goes with it, rival hydrocarbons.
Batteries have SO many benefits, they just suck at energy density. At the moment . . .