How to divide the positive and negative poles of the car battery, how to see the positive and negative poles of the battery

I believe many friends who own cars know that if the car is left unused for a long time, it is likely to cause a serious loss of battery power. Therefore, at this time, we need to disconnect the car's battery before going out. However, some riders do not know how to divide the positive and negative poles of the car battery. In order to answer everyone’s doubts, let’s talk about how to look at the positive and negative poles of the battery today.

The most conceivable and easy way to distinguish is to observe the color of the wiring harness. If it is red, it means that the terminal is positive, and black is the negative terminal. Secondly, we can check the logo on the battery, usually there will be a "+" symbol near the positive terminal, and the negative terminal will have a "-" symbol. In addition, there is a difference between positive and negative terminals. The thick end of the pole is the battery positive pole, and the thin end of the pole is the battery negative pole.

So, when we remove the battery cable, we must first remove the negative electrode and then the positive electrode. Why do we say that? It is important to know that the negative terminal of the car is connected to the body, and the body is originally metal, so the whole car is connected to the negative terminal. In other words, at the moment the battery cable is removed, the car's circuit cannot form a loop (the battery cannot continue to supply power).