How Long Should A Car Idle To Charge Battery. That is being turned by the engine crankshaft. Aside from jump starting the fastest but not always the most efficient method you can also consider using a reliable car battery charger.
However if you plan to leave your car idle for weeks or months unsupervised you can leave the trickle charger on. If you find any of these cars start easily the starter spins quickly battery status is likely quite good and a short drive or idling for 10 to 15 minutes may be adequate to keep the battery full if done once every two weeks. Five minutes is not much of a charge and if the car is sitting a lot in the garage for a week here and a week there I would probably recommend getting a Battery Tender to keep the battery from sulfating.
There are a few variable involvedNamely the size of the battery and its general health.
To boost your battery enough to be able to start the engine it would take around 2-4 hours. That is being turned by the engine crankshaft. Then the alternator is producing AC current thereby charging the battery while your car is idling. As long as the mechanical action of the alternator is taking place.
