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Does Idling Car Charge Battery . The answer is ‘yes’, yes the car battery does charge while the engine is idling. Idling the engine does charge the car’s batteries. How Long Does It Take to Charge a Car Battery? • Road Sumo from roadsumo.com That’s precisely what “idling” means. While it’s technically attainable to charge your car battery by simply idling, it’s not efficient. You’d doubtless leave your automotive running for hours to even equal to a full charge.

Does Car Battery Charge While Idling . As long as the mechanical action of the alternator is taking place; Even while the engine is off, the battery will continue to charge. How Long To Leave A Car Running To Charge The Battery Battery Tools from batterytools.net During idling, your engine and alternator run slowly. As covered previously, a car’s battery will charge whenever the engine spins the belt tied to the alternator. Note that “running” doesn’t necessarily mean “moving”.