How to Jump-Start a Dead Car Battery with Another Battery?

[EvanLynn]

Here is the relevant introduction to jump-starting: 1. Connection and disconnection sequence: positive, negative; negative, positive. It is best to operate independently by a single person. 2. When connecting, first connect the positive terminals of both batteries, then connect the negative terminals. 3. When disconnecting, first disconnect the negative terminals of both batteries, then disconnect the positive terminals. 4. It is best to have one person operate alone, as two people operating together can easily lead to accidents. 5. This is because the exposed metal of the car frame serves as the ground, connected to the negative terminal of the battery, commonly referred to as "grounding." The positive terminal of the battery extends through a series of wires to where it is needed, and then the negative terminal is sourced locally to power the electrical devices. When connecting two car batteries, if the negative terminal is connected first, it is equivalent to grounding both cars, applying negative electricity. At this point, extreme caution must be taken when connecting the positive electrode. If it accidentally touches the metal on the car frame, it will inevitably produce strong sparks, and may even cause a fire.