I have a Costco battery for maybe 6-8 months. I went in to body shop and they told me normal is 600 cc but this one is coming back at 495cc. The alternator should charge it.

Faulty battery only after 6-8 months?

 

What is the CCA per the label on the battery itself?

 

It can happen. Per above, you'd need to verify the battery's specs.

 

600 cc when cold

 

What prompted the body shop to test the battery?

 

They just test things when they do oil change.