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Every automotive vehicle needs electricity to operate. The electrical system of a vehicle consists of a battery and an alternator, except in vehicles earlier than 1970, when most of them had generators instead of alternators. The alternator is connected to the engine by a belt and generates electricity to recharge the battery. The battery makes 12-volt power available to everything in the car needing electricity, including the ignition system, radio, headlights, windshield wipers, power windows and seats, computers, etc., through the vehicle's wiring. The vehicle's alternator or generator produces that energy, and supplies the electricity that charges the vehicle's battery.
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