Can the Engine Charge the Battery at Idle Speed?

[GrantDella]

Yes, the engine can charge the battery at idle speed. If the charging indicator light is not on when the car is idling, it means the battery is not being charged and is still discharging. Normally, the charging indicator light should be on, indicating that the battery is being charged, although the charging current is very small. When the ignition switch is turned on, the battery supplies excitation current to the generator through the ignition switch, fuse, charging indicator light, and diode, and also provides voltage to the regulator's detection and control section. The battery is an essential part of a car and can be divided into traditional lead-acid batteries and maintenance-free batteries. Since the battery uses lead-calcium alloy for the grid frame, the amount of water decomposition during charging is minimal, and water evaporation is also low. Additionally, the sealed structure of the casing releases very little sulfuric acid gas. Compared to traditional batteries, these batteries have advantages such as not requiring any liquid addition, easy connection to terminal posts, and long power storage duration.