[93po]

Some newer battery cell chemistries are using very very little rare earth elements

[pengaru]

A propane tank is basically just the hollow shell of a battery, made of even cheaper mild steel since weight is far less of a concern. There's no contest in this department.

Not that I'm in favor of combustion engines persisting.

[93po]

I’m not saying your arguments don’t hold. Just that the calculations may be closer than stated