2. Secondly, it is best to wrap the connector with insulating tape to prevent the positive and negative electrodes from being accidentally connected together, causing a short circuit in the automobile circuit, and then the battery can be taken out.
3. Finally, replace the battery. When placing a new battery, pay attention to the direction of the positive and negative poles. According to the color, the red protective cap is the positive electrode and the black protective cap is the negative electrode. If the positive electrode is on the left, put the red end on the left.