Nothing to worry about.

You weren’t the person who made the comment.

It wasn’t installed wrong, it was improperly installed.

Are we serious with this sentence?

“Wrong” and “improperly” are synonyms. It still doesn’t explain how you can install a battery incorrectly and still be able to drive the car.

In order to be helpful, you’ll need to give us more information. What’s the year, make, and model? What are the specific CEL codes?