Yes, the batteries are very energy intensive to produce. Which is a very strong incentive to build lithium ion battery factories where cheap electricity is available, which most likely means hydro, or other renewables (because hydro, wind, solar tend to be far from population centers). I've seen some really unfair analyses of the CO₂ produced by EV production that assume all energy inputs are from renewable sources at the US average (just 21% of electricity in 2021), which is not true.

So battery production is a good way to transport energy from where it's cheap to produce to where it's needed, much better than bitcoin.

EV are heavier but more efficent because electric motors are more efficent.

Yes, in isolation. But it the electricity production is burning gas, the inefficiency is moved to the power plant rather than avoided (this still makes EVs better, just not as good as they could be in a completely carbon-free grid).

The main effect of mass is when comparing 2 different EVs: one that is twice as heavy has ~twice the initial production emissions, as well as twice the energy consumption (and emissions, as the case may be). Even with EVs, large and heavy cars are very wasteful.

Larger power plants are far more efficient then ICE engines you can put on a car.

> Even with EVs, large and heavy cars are very wasteful.

Yes, I am pretty anti-car and anti-big car so sure that is true.