1. Disassembly: first remove the negative electrode, then remove the positive electrode

      The first removal of the negative pole is for safety: because of the circuit structure of the car, the negative stage is connected to the body. If the positive stage is removed first, it is possible that the positive stage will touch other parts of the body and cause a short circuit. Even if the terminal is not so long and cannot touch the body, it will touch the body when using maintenance tools during disassembly, which will also cause battery damage. short circuit. The short circuit of the battery is very dangerous. In light cases, it will cause short circuit damage to the battery, and in serious cases, it will cause the car to catch fire, with disastrous consequences.

2. Installation: first install the positive electrode, then install the negative electrode

      When installing the battery, it is the same to install the positive level of the battery first. It is also for safety. After the positive pole of the battery is installed, it will not move around, because the negative pole of the battery and the body are both negative, so it will not be short-circuited even if it touches, and the negative pole will not be short-circuited. It is precisely to be connected to the body.