Battery is the core component of the automotive electrical system, If the engine is the heart of the car, The battery is the key to activating the heart. Not only that, The battery will still be during driving, Continue power supply to many electrical and safe and comfortable systems. For example, car headlights, car audio and electric heating seats.
If the battery fails, These devices may not be used normally. This is also the first reason for calling road rescue calls! Today I will talk to you about the problem of battery! it is known，Under different climate，Various parts on the car also have different resistance。Under high temperature weather，The most vulnerable is the tire; when the temperature is relatively low，The most stressful is the car battery。So why is it under low temperature environment，The battery will be so fragile? Knock on the blackboard!，and every time I drop 1 °，The available capacity of the battery will decrease by about 0.8%，The capacity will be recovered when the temperature rises。In a low temperature environment，car supplies such as: seat、rearview mirror、Heating function of the steering wheel，and glass divorce and many other high -power devices need to be used for electricity，Therefore, a lot of power use pressure。

What are the signs of the battery? it is known，The service life of the normal car battery is 2 and a half years and 3 years.。When the general car is maintained，Master will help you replace。Of course, the specific situation still depends on your driving habits，The "battery killer" that appears in less than two years is not without。When you encounter the following situation，Unfortunately tell you，Your battery is not far from replacement:

1、The car is more difficult to start than usual. When there are no other factors，If you suddenly find that your car starts is difficult，It may be a precursor that the battery is about to be scrapped。Of course there is still a situation in winter，It is the so seabet my-called winter cold launch difficulty。This depends on whether your car love car is still new car or is almost almost the battery is scrapped。

2、 During idling，Big lights "candle" such as waiting for red lights or temporary parking，Suddenly found that your headlight suddenly darkens。This is because of idle，The charging power of the engine decreases，If the battery is not given at this time，At the same time, if the electricity equipment is powered on the vehicle，Then the battery of the balcony of the car will decrease significantly。

3 , battery fault alert light is on
There is nothing to say about this，The fault light is directly reminding you。You really want to go to 4S or repair stores to check and replace it。

4. There is abnormal noise due to the weakened battery discharge capacity when starting，Poor boot operation and squeak sound，This situation is particularly obvious at low temperature，Because the weather is cold，The activity of the battery will also be reduced，and this situation will improve or disappear after the weather warms，So many car owners do not think of。

5. Observation port changes Many observation ports on the battery -free battery，There is a light show whether the battery work is good，Green is good，Black needs to change the battery，However, some owners also report that this light is not reliable，Obviously green cannot start the vehicle，As a reference。

6. Drumbar appears in the battery，Leakage of liquid here mainly depends on whether there is a leakage or a drum in the battery，If this happens, you should replace it in time，This situation brings not only the problem of battery life，There are even certain safety hazards。7. The normal voltage of the voltage changes before and after startup is about 12V，After starting, due to the charger charging，The voltage will be increased to about 13-14V，Many vehicles have the function of voltage detection，Following the voltage before and after starting is also a good means to judge the life of the battery，The vehicle is lower than 12V when the vehicle is not started or less than 13V after starting.。How to check the battery by yourself? Check the battery，We can mainly look at two seabet mydata: one is voltage，The other is the start -up current。As for the monitoring of the start current，To use relatively complicated equipment，Only in the general maintenance plant。But the check voltage is very simple，General multimeter is enough to cope with，and simple operation。

How to maintain the battery? The battery is a consumable，The day when there will be failure，It can only extend its service life as much as possible by the usual details。To develop a good car habit。

1、Before parking，Turn off the lights first，The old models of the air -conditioning are not supported by the function of automatic power outage after the flameout，So you need to manually turn off the lights and read lights in the car before turning off。If you need to find something in the car or need lighting, you can use your mobile phone or flashlight for lighting，Eliminates the reading light forgot，Caused the battery power loss。Many people are easy to ignore the air -conditioning system，After the fire is turned off，The air conditioner is maintained in the open state，Although there is no energy，The air conditioner cannot be started，But when we start the car again，The air conditioner will run automatically，This is very large for the load of the battery，It will also affect the life of the battery。

2、The car also needs to be slippery frequently, even if all the power system in the car is turned off，After a long time parking for a car，The electricity in the battery may also be exhausted，All，Even if I love the car for a long time, I am idle at home，Also start the engine regularly，It is best to slip on the road for more than 20 minutes，This can also ensure that the battery has sufficient time to charge。

3、Wipe one wipe more healthy and regularly open the engine hood，Wipe the battery positive with a wet cloth、negative two pole heads，(That is, a black wire，Insert on the surface of the battery，The two silver cylinders who are exposed outside)。Wipe the dust covered on the pole head with a wet cloth、Oil pollution、White powder，Not only does it play a clean role，It can also effectively reduce the accumulation of white acid erosion powder，Can play a role in protecting the battery。

4. Before turning off the fire, close the window
The switch of the car window and sunroof of the car is powered by the battery，So everyone is best to turn off all windows before turning off，Turn off after turning off，Even after leaving the car, use a long press to lock the car key to close the window。Actually，The maintenance of the battery is very simple，Although it is the consumables on the vehicle，but it does not mean that the life of the battery must be short，Through reasonable use and daily maintenance，The life of the battery can not only be extended，Nor does it fall off at the critical moment.。