Will Car Idling Charge Battery. Modern alternators will put out 70-80 amps at 3000rpm engine speed not alternator and 15-25 amps at idle. A dedicated battery charger should be used.
Again I encourage you to watch the video above this answer will make more sense. Lastly you may have heard that idling your car for 15-20 minutes is a good alternative method to recharge your battery. Starting your car as you can imagine uses a lot of.
Older vehicles with few electronics on board can go 3 to 4 weeks until the battery will be too weak to start the engine.
On a modern engine yes. Connect the negative lead from the car battery charger to the negative terminal on your battery. As long as the mechanical action of the alternator is taking place. The answer is YES yes the car battery does charge while the engine is idling.
