What are some reasons why my car battery sparks when connecting the charger?

I needed a jump start today and there were some sparks when my friend attached the cables. What are some reasons why my car battery sparks when connecting the charger?

Find out if you’re getting ripped off on your car insurance in less than two minutes.
No spam · No long forms · No fees
Find savings (100% Free)
rating white
3.5k Ratings
Answer provided by
Bonnie Stinson
Answered on Aug 02, 2022
If your car battery sparks when connecting the charger, either some of your car’s electronics were on when the car died or the cables were attached in the wrong order.
Note that sparks may indicate that the jumper cables are placed incorrectly. This is very serious and could result in irreparable damage to the battery or the car’s electronics. Large, loud pops and smoke are not normal.
On the one hand, it’s normal to have some sparks when you use jumper cables. Usually, this means your radio or lights were on when the car died. When the car draws current via the donor car, it creates a spark. Nothing to worry about.
This is one reason experts recommend that you connect the negative cable to the body of the vehicle and not to the negative post on the battery when jumpstarting. Sparks flying away from the battery are much safer than near the battery, where hydrogen gas from the battery could catch fire.
If you noticed a few quick sparks and everything is still functional, don’t worry about it. If you heard a loud pop, you might want to get things checked out.
Now might be a good time to review your car insurance coverage. While most policies don’t cover general wear-and-tear, you could probably find a cheaper policy with help from Jerry.

Here to save on car and home insurance? Great, you do that. We’ll do everything else.

Sign up in under a minute.
No need to fill out forms or shop around. Sign up in 45 seconds to start saving. Jerry does the rest.
Jerry collects and analyzes your current coverage.
Say hello to Jerry, your new insurance agent. We’ll contact your insurance company, review your current plan, then find the coverage that fits your needs and saves you money.
Get the best options before your renewal.
Jerry does all the picky, busy work by comparing prices and coverage from more than 50+ insurance companies. We compare what we find to your current policy and offer you the three best options before every renewal.

Easiest way to compare and buy car insurance

No long forms
No spam or unwanted phone calls
Quotes from top insurance companies
Find insurance savings — it's 100% free