Does A Car Battery Charge When Idling. If you have a working alternator then the battery will receive current all the time when the engine is on. Most modern cars will have some charging during idle but highest charging rate occurs during decel conditions and normal driving.
The answer is YES yes the car battery does charge while the engine is idling. The short answer is yes car batteries do charge when the car is idling because of the alternator that becomes the main power source of the battery and the entire electrical system of the car. Again assuming that the battery can still hold a charge.
Then the alternator is producing AC current thereby charging the battery while your car is idling.
Most modern cars will have some charging during idle but highest charging rate occurs during decel conditions and normal driving. If all the electrics lights heated screem etc are off then just idling it will charge the battery. Most modern cars will have some charging during idle but highest charging rate occurs during decel conditions and normal driving. It is quite the opposite though idling your car must charge your car battery.
