If electric vehicles included a generator they could charge the battery while moving. It seems the best choice to me.
Generators take energy to run. Thus putting a drain on the batteries.
A generator is not 100% efficient, so it takes more energy then it produces. In a gas-powered car, where the engine runs all the time when it's moving, there is extra energy available to power the generator that would just be wasted.
It seems you are asking about a generator that is separate from a diesel or petrol engine and are only referring to the part that turns the mechanical motion into electrical motion. AND You answered your own question. Such a generator attached to a vehicle would through its operation slow the vehicle. As it turns the vehicle inertial into electricity the vehicle will slow. We call this regenerative braking and in some electric vehicles this is done electronically by switching the electric motor into a dynamo (a generator.) But this does not suddenly make a perpetual motion machine. The car continues to lose energy to resistance that is not recovered.
WELL THEN ITIS CALLED A HYBRID BECASUE IT IS NOT RUNING OFF OF STORED ENERGY AND CHARGED SOMWEWHERE ELSE I HAVE WONDER THE SAME THING AS WELL BECAUSE THE GREAT BIG LOCOMOTIVES THAT PULL HUNDREDS OF FREIGHT CARS USE A DIESEL ENGINE TO RUN A MASSIVE GENERATOR THAT RUNS ELECTRIC MOTORS AT THE WHEELS, ITS MORE EFFECIENT AND THAT BEEN USED FOR YEAR,S ON TRAINS,
Because a generator runs on gas. And they do have regenerating chargers while the car is moving. They just are not a typical generator
