Will A Car Battery Charge At Idle. Then the alternator is producing AC current thereby charging the battery while your car. This can happen when cars are running idle even while charging your phone for a long period of time or with your car accessory equipment on in the background.
So to put it simply yes MOST vehicles will charge the battery albeit slowly at idle RPM. Rule of thumb that I was taught is 1 start 10 minutes of driving to recover. If you reduce the size of the pulley on the alternator you will get more Amps for the same engine speed.
Charging while idling will charge your battery but slowly.
This can happen when cars are running idle even while charging your phone for a long period of time or with your car accessory equipment on in the background. That is being turned by the engine crankshaft. The answer is YES yes the car battery does charge while the engine is idling. A fully charged battery A healthy charging system A reasonable electrical load A 12 volt system In that case most likelybetween 128 and 139.
