How to Check the Battery Level of a Car Battery?
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Methods to check the battery level of a car battery are: 1. Observe the battery level indicator, where black indicates the need for charging, green indicates good condition, and white indicates insufficient fluid and the need for replacement; 2. Check the appearance of the battery for obvious deformation or bulging on both sides, which indicates the need for replacement; 3. Perform a voltage test on the battery. Functions of the battery: 1. Supply power to the starting system, ignition system, and electronic fuel injection system when starting the engine; 2. Provide power to the car's electrical equipment when the engine is stopped or at low idle; 3. Participate in power supply when the power demand exceeds the generator's supply capacity; 4. Stabilize voltage and protect the electronic equipment in the car.