Does A Car Battery Charge While Idling. The answer is YES yes the car battery does charge while the engine is idlingAs long as the mechanical action of the alternator is taking place. How Does A Car Battery Charge.
Were definitely saving money on gas. So basically letting your car idle must not drain your battery. Then the alternator is producing AC current thereby charging the battery while your car is idling.
It spins because it is mechanically coupled to your engines crankshaft.
Starting your car as you can imagine uses a lot of. To maximize charging at idle turn off all accessories air conditioning and lights if possible to reduce stress on the alternator. Starting a car draws 100 to 300 amps to start a car and idling a car for 15-20 minutes will only replace 3-4 amps the car battery never gets fully charged. At idle the battery can take around 2 hours to charge up to 80 complete if it was flat and the alternator can generate 14 volts.
