How to judge whether the car battery needs to be replaced?

Car batteries are usually replaced once every two years, and should be checked frequently during use, especially when it is hot in summer and cold in winter. Under normal circumstances, the normal life of car batteries is about 2-3 years, but many people have used them for more than 4 or 5 years. The key lies in the owner's usual usage habits and the importance attached to battery maintenance.

How to judge whether the battery needs to be replaced;

1, battery failure warning light comes on If the warning light similar to "battery" comes on on the dashboard after the vehicle starts self-inspection, it means that the battery indicates that the battery is low and it is time to replace it. At this time, it is best to go to the auto repair shop to check and replace the battery as soon as possible.

2. The vehicle is more difficult to start than usual. If the vehicle is found to be more difficult to start than usual, it may be due to insufficient battery power. Especially in the cold autumn and winter, this phenomenon is mistaken by most people as "difficulty in cold starting in winter", but in fact it may also be a precursor to the impending failure of batteries.

3. Headlights dim inexplicably when idling. When the vehicle is idling or driving at a low speed, the battery will assist the power generation system to supply power to the electrical equipment in the vehicle. However, if the battery is not enough to provide auxiliary power at this time, there will be such a situation that the headlights dim inexplicably.

Replacement process

Before replacing the battery, clean the terminal and battery chassis, stop the car, pull out the cigarette lighter, insert the memory card, and store the car identification code, radio and navigation system settings. The following are the replacement steps:

1. Open the hood and find the car battery.

2. Disconnect the battery cable and take out the old battery. Disconnect the negative battery cable with tools first, and then disconnect the positive battery cable. Mark the corresponding positive and negative poles on the two cables to avoid confusion. Finally, loosen the fixing screw and take out the battery.

3. Finally, put on a new battery.