Recently took my car in with a slow cranking condition. I have read the TSB and know there is a new battery w/ 640CCA. The service guy looked at the battery and said I have the new one installed. I am skeptical that I do in fact have the new one.

The TSB says the PN for the new battery is 0000-80-MT35-WB. Did not find that number anywhere on my supposed new battery. Did find these numbers though. T-6 KJ01 18520A, 75D23L-MF & 046121.

How can I tell if the service dept is just blowing smoke? Thanks