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What are the precautions for jump-starting a car?

1 Answers

SanJosie

07/30/25 7:00am

Precautions for jump-starting a car are as follows: 1. Use jump-start cables that meet the requirements; 2. Ensure the battery holder and battery are securely connected, as poor contact can cause sparks or excessive heat; 3. Check the labeled voltage of both batteries to ensure they are the same; 4. Put the car in neutral, engage the handbrake, and start the engine; 5. If the first attempt fails, wait a minute or two before trying again. Reasons to pay attention to the connection sequence when jump-starting: 1. Most vehicles have negative grounding, meaning the metal parts of the car are connected to the negative terminal. 2. A short circuit in the battery can be extremely dangerous, and the presence of flammable engine oil and gasoline in the car can easily lead to accidents. 3. Sometimes, small amounts of hydrogen gas may accumulate around the battery, and there is a slight risk of spark-induced hydrogen combustion during the connection process, though this scenario is very unlikely.

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