How long does it take to fully charge a depleted battery at idle speed?

[Sharon]

After the battery is depleted, if the idle speed is 1500 rpm, charging for more than 60 minutes will basically fully charge the battery. The details of charging at idle speed are as follows: 1. It is best to charge while driving, and try to avoid charging at idle speed. 2. Charging at idle speed is possible, but prolonged idling can damage the engine. 3. If the vehicle idles in place for a long time, carbon deposits will form in the engine combustion chamber. 4. The charging effect at idle speed is generally not ideal. Idling the car for ten minutes does not charge as much as driving ten kilometers. This is because the generator produces very little electricity at low speeds, and only during normal driving does the generator's current reach the designed standard current. 5. Idling the car in place can lead to exhaust poisoning. If this happens in a garage, the risk of accidents is significantly higher.