Can the car battery be charged if the engine is idling?

[EmiliaLee]

Yes, the battery can be charged. There are two key techniques for charging a car battery: 1. Avoid connecting high-power electrical devices directly to the battery. Many in-car appliances such as car refrigerators, vacuum cleaners, and air pumps have high instantaneous power consumption. Instead of powering them directly from the car battery, it's better to start the engine first and then connect the electrical devices. This provides good protection for the battery. 2. Turn off the air conditioning before shutting down the engine. Most car owners are accustomed to leaving the air conditioning on or letting it start automatically with the vehicle, which can cause an instant high power load on the battery and lead to wear and tear over time.