The car battery is an indispensable part of the car, which is responsible for providing starting current to the engine and maintaining the normal use of various electrical equipment in the car. Once the battery fails, the car will not be able to start, and can only wait for rescue in place. Today, I will briefly analyze the 5 major characteristics of the battery before it fails. Once these situations occur, it is necessary to check it as soon as possible.

 

The battery fault light is on

I believe this needless to say, once the battery fault light on the instrument panel lights up, it means that there is a problem with the battery. However, sometimes even if the battery fails, the battery fault light will not turn on, but a series of fault lights will turn on, such as airbag fault light, engine fault light, etc. These may be chain reactions caused by battery failure, because A faulty battery can cause a disturbance in the on-board computer system.

 

The car starts abnormally. The starting of the car is realized by the current provided by the battery. Once the car is difficult to start, it often takes two or three times to start the car, and the sound is very abnormal, and it feels that the car has no strength to start. When these situations occur, it means that the battery may be ready to fail and cannot give the car a strong current that starts instantly.

 

Lights dim when idling

This phenomenon may occur in some cars. When the car is usually driving on the road, the lights are still good, but once the car stops and enters the idling condition, the lights are obviously dimmed. If this happens, it means that the state of the car's battery is not good, because the headlights of the car mainly rely on the remaining power of the battery to work when the car is idling.

 

Turning the headlights on too high when idling

As mentioned above, if the battery power is not enough, the headlights will dim when idling. In another case, if the headlights are turned on when idling, and the speed on the dashboard is much higher than usual, this may also indicate that the battery is in poor condition. Because turning on the headlights requires a strong voltage, if the battery power is not enough, you need to rely on the extra work of the engine to help, and the speed will naturally increase.

 

The air volume of the air conditioner decreases when idling

This is also well understood. Although the compressor of the air conditioner is driven by the belt of the engine, its blower is powered by the battery. If the voltage of the battery is not enough, the air volume of the air conditioner will drop down when the air conditioner is turned on for a while, because the battery cannot provide enough voltage for the blower.

 

Conclusion: The above five situations can be said to be the obvious characteristics of battery failure. Through these methods, the state of the battery can be judged. Once the car has these conditions, it is best to check it as soon as possible, otherwise you can only pay for a tow truck when it "lies" halfway.