They will decrease the charge of your battery. But, guess what? Turning those things on in your gasoline car will do the exact same thing. There's no such thing as a free lunch.
There is the point that electric cars all recover energy from braking, something no gasoline car hs figured out how to do.
But you car won't run out of gas if you turn on the heat.
It most certainly will. First, turning on the heater in an electric car, unless it is seconds from dying anyway, is not going to bring your EV car to a halt. Second, let's put two identical gas cars side by side, both at a fast idle. Turn the heat on in one of them. Guess who runs out of gas first?
Your electric car will not go as far in the winter if you run the heat or in the summer if you run the AC.
Neither will your gas car.
Cars don't need regenerative braking because the engine produces ample power to turn the alternator for battery recharge.
It's not a matter of "need". If a car could somehow produce gasoline from braking, I guarantee you it would benefit the car. That an EV can recapture energy normally lost as heat every time you put on the brakes is an enormous benefit.
So again I ask what is the "real" performance of these cars. We all know that no car lives up to the EPA mileage figures on the sticker so I'm sure no electric car will actually perform as well as they claim
As will no gasoline car. I have a Hyundai Elantra that claimed 40 mpg highway when I bought it. Hyundai was sued in a class action suit for falsifying this figure and they are now paying cash to Elantra owners to compensate them for having to buy more gas then the original claim would have required. Nothing is perfect and all businesses try to maximize profits. However, I guarantee you that a hybrid or EV car will consume less gasoline and produce less GHG emissions that will everything shy of that 3-wheeled go-kart they're always advertisting for $8,300. If every watt of your household electrical power is produced in a dirty coal power plant, your CO2 footprint may be no better than a 40 mpg car, but it will still be better than the vast majority of cars on the markets and, as alternative energy use in the national grid increases, your footprint will do nothing but get better.