Will Your Car Battery Charge While Idling. Youd likely have to leave your car running for hours to even come close to a full charge. While it is technically possible to charge your car battery by just idling its not very efficient.
In older vehicles idling your car for 15-20 minutes can give your battery enough. While some people would recommend idling your car to charge the battery it is not widely recommended. When I am driving the battery seems to work fine but yet the battery loses charge when I am sitting in the car while running on idle.
Then the alternator is producing AC current thereby charging the battery while your car is idling.
On the other hand the alternator is. If your car is a few years old alternator brushes are a little worn so output wont be as much as when new. If all the electrics lights heated screem etc are off then just idling it will charge the battery. As I said before it is inefficient a waste of gas and.
