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The generator charges the battery! In an automobile, the battery produces the electricity to start the car. Starting the car takes electricity out of the battery. The car needs to replace the electricity so it will start again the next time. The generator produces the electricity to recharge the battery so the car will start the next time.

Cars today use Alternators not Generators. Generators have not been used in autos since the mid 60s. Alternators unlike a generator can still charge a battery even with the engine idling. Alternators are more complex but much better at handling todays high demands for current on modern cars with all the associated electronics.

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15y ago

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