When I bought my 2010 Honda Accord in January of 2020, the dealer had put in a new battery when listing the car for sale. In the fall of 2022, I had a rash of dead battery calls to AAA.
When I was looking at the battery while the AAA tech was replacing it, I noticed the words "24 month" on the decal on top. So I guess I got two years - and then some - out of it!