How Long Should I Charge A Car Battery. Again I encourage you to watch the video above this answer will make more sense. 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.
Set your battery charger based on your needs. How long should I idle my car to charge the battery. While some people would recommend idling your car to charge the battery it is not widely recommended.
In older vehicles idling your car for 15-20 minutes can give your battery enough charge to restart your vehicle but it is not always great for your vehicle.
The answer is YES yes the car battery does charge while the engine is idling. The most common rate for car battery chargers is around 4 amps. If the battery wont even take a charge its almost definitely dead and needs to be replaced. If the battery voltage is below 1185 and your charger is putting out a 5-amp charge rate it will take about 12 hours to fully charge a battery with 400 to 500 cold-cranking amps.
