Can idling for 30 minutes fully charge the battery?

1 Answers
MadelineAnn
07/24/25 7:13pm
Idling for 30 minutes cannot fully charge the car battery. If the battery is relatively new and has sufficient charge, it still requires about an hour of idling to fully charge. During idling, the alternator cannot output its maximum voltage and current, resulting in slower charging speed. The battery is a crucial component in a vehicle, responsible for storing electrical energy. Without it, the car cannot operate normally. When the engine is not running, the battery powers all electrical devices and is responsible for starting the engine. During engine startup, the starter motor, ignition system, and fuel supply system all require electricity to function.
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