How long does idling take to fully charge the car battery?

[VanThomas]

Idling the car for 20 minutes can fully charge the battery. Here is some information about car idling: 1. The purpose of car idling: Idling is an operating condition of a car, where the engine runs in neutral gear. The engine speed during idling is called idle speed. The idle speed can be adjusted by changing the throttle size. Idling means the engine is "producing power without doing work." When the engine is running, if the accelerator pedal is completely released, the engine is in an idling state. 2. Reasons for unstable idling: Direct causes refer to mechanical parts being dirty, worn, or incorrectly installed, leading to changes in cylinder power, resulting in an imbalance of power among cylinders and causing unstable idling. Indirect causes refer to abnormalities in the engine's electronic control system, leading to poor combustion of the air-fuel mixture, making it difficult to balance the power among cylinders and causing unstable idling.