Hydrogen gas.
The alternator is connected to a gas powered engine. This charges the battery.
Go to the site I linked below, and click on the electric box. It shows all the places where a person can recharge their car if they have an electric or electric hybrid. If there is no place near you to recharge your electric car battery, (and you do not have a place at home or work to recharge the battery), you might want to think twice before getting an electric car. People did not switch from horses to gas powered cars, until there were gas stations near where they lived or worked.
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One of the best reasons to buy an electrical car is for the ability to recharge the battery at home. When you buy an electrical car, you will be able to recharge the battery at home. You will never again have to worry about filling up your tank at a gas station. You will be saving valuable time and money all while helping the environment.
A hybrid car is a car that runs on battery and gas. It uses standard unleaded regular gas.
Generally, automotive batteries discharge Hydrogen Gas during both the charging and discharge cycles.
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Well....gas cars run until the gas runs out but it takes a while with a 30 gal. tank. You don't have to refuel as much. Where battery cars have to recharge every night. battery cars are better for the earth (global warming i guess :P) but over all you have to look at it and see i would say that i don't really know. I gave you some ideas to think about. :D
don't drive with lights on inside or outside the car during the day...do not listen to the radio and try not to leave doors open or anything that will drain the cars battery because the car must do work to recharge it and that uses up gas.