When I bought my new 2023 New Aire the chassis batteries were worthless due to how many times the dealer had let them go dead while sitting out on the lot (they never flip the 12V DC circuit breakers back by the batteries off). I had to replace mine within the first couple of months as they would never hold a charge. Loads of fun trying to get the dealer to do anything about it. Unless there is an obvious manufacturing defect found with the battery, they like to blame the owner of the vehicle for all things batteries...
Best,
-Mark