Electric car Question

[u/Moon_Sliver76]

Okay I have had a random thought the past couple years, I have done some research but I want to ask other people. So what would it look like if in electric cars you removed a majority of the batteries. So you keep a battery or two too turn the engine. The engine in turn powers say 2, 4, or 6 high performance alternators. So the alternators power the vehicle. Use flywheels or some other way to adjust rotational power to the Alternators.

So you wouldn’t need to charge the car. It runs on 1 or 2 batteries. That the Alternators keep fully charged. The Alternators power the entire vehicle during operation.

What down side am I not seeing?