Q: After work the other day, I went out to my car and it would not start. One of my co-workers volunteered his car to jump-start mine. My car started, and I drove it to my repair shop. It turned out all I needed was a new battery, but my repair shop told me that jump-starting a car can be dangerous or can cause electrical problems if not done correctly. So, was I just lucky that nothing happened or are they exaggerating the possible concerns? And why did the battery go dead like that with no warning?

A: There are a number of things that can go wrong and cause serious damage to a vehicle’s electrical system or even harm you if the jump-start is not performed correctly – cables crossed, hooking a positive to a negative, etc.

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