Battery (battery) as one of the important power sources on the car, mainly used to start the car starter and various electrical equipment power supply, so the car battery is also known as the start-up battery. Theoretically, the service life of the car battery is three years, and if the maintenance is better, it can extend the life of the car battery for a long time. However, if there is a frequent power loss, excessive discharge, or modification of high-power car speakers, lights and other equipment, it may have to be replaced in about a year. If you want to buy your own car battery and replace it is completely ok, but in the process of purchase, you should pay attention to the battery model, capacity, type and brand screening, below I will talk in detail about the problems that should be paid attention to in the process from purchase to battery replacement.
First, when purchasing, you should pay attention to the model, capacity, volume size, rated voltage and other parameters of the battery to match the original car battery. If the rated voltage of the original car battery is 12V, then do not choose 24V, otherwise it will burn the fuse or engine ECU; if the original car battery rated capacity is 54Ah, then do not choose 50Ah. Because in theory, the rated capacity can be large and not small, but do not blindly increase, try to choose the battery capacity that matches the original parameters. If you don't know what type of battery you should buy, you can open the lid to view the old battery, which is generally marked in clear text. It should be noted that some of the batteries of the car are in the trunk or under the main and passenger seats.
Second, when purchasing, you should pay attention to the choice of battery type, the battery of the current fuel vehicle on the market is mainly divided into ordinary lead-acid batteries and AGM automatic start-stop batteries. Therefore, when buying batteries online, you should first see whether your vehicle has a start-stop function, and if so, you need to use a special AGM battery for start-stop. If you accidentally buy the wrong lead-acid battery, the light will lead to the failure of the start-stop function, and the heavy may cause the burning of various control modules. Because ordinary batteries and cars are not fully compatible, when ordinary batteries are used instead of automatic start-stop batteries, the power management system will report errors after detection, and the car will not be able to start.
Third, when purchasing, you should try to choose regular channels and batteries with better brand. It is recommended that when you buy a battery on the Internet, do not be greedy and cheap, otherwise there will be many problems in the later use process. The purchase channel also tries to choose the franchise stores and direct stores of large brands, etc., as for the brand, you can choose well-known brands such as Fengfan, Camel, Bosch, Walta, GS, Yuasa, Chaowei and so on. But it should also be noted that it is these brands that have a large awareness, so the market is also full of many counterfeit and shoddy products, I hope that everyone can be careful to identify.
Fourth, a set of tools is needed when changing the battery, after all, "it is difficult for a smart woman to cook without rice". The battery positive and negative pile head fixed bolts are generally 8mm and 10mm, as for whether to use a wrench or socket, this depends on the actual situation of your vehicle. In addition, there is also a battery fixing bolt, generally 10mm, 12mm and 13mm. In the process of replacement, it is also necessary to pay attention to the positive and negative electrode wiring harnesses must not be reversed, otherwise the engine control module will be burned, which will lead to the inability of the vehicle to start.
Fifth, when replacing, we should pay attention to whether the vehicle can be powered off, because after replacing the battery of some models, there will be a failure of the start-stop function, the radio lock, the start of the anti-theft system, the failure of the one-key window, the sunroof cannot be closed, and the fault light will be lit. For the above types of models, I personally recommend that you do not replace them yourself, but if you have to replace them yourself, it is not impossible. You only need to buy another electric treasure, and use the electric treasure to clamp the positive and negative pole wiring harness when replacing it to ensure that the whole car is not powered. In addition, in the process of replacing the battery, it is necessary to pay attention to the positive wire harness not to tie the iron, otherwise the fuse or ECU may be burned.
Sixth, after the replacement is completed, the vehicle should be started to idle for half an hour, or drive the vehicle out for a distance. During this time, you can adjust the time in the car, you can also match the window of the car that fails to lift and the function of starting and stopping that fails. If the meter has a fault light, then just drive the vehicle out for a distance, and it will disappear on its own. In addition, for some models, it is also necessary to use a diagnostic instrument to match the battery parameters, if it is not matched, it will cause the "battery light" on the instrument to be on.
The above is about the purchase and replacement of car batteries need to pay attention to the six aspects, I hope to help you!