Thank you to the general wal mart manager Denise. I was lucky that she happened to be in the auto shop while I was trying to exchange a bad battery that was still under warranty. I hadn't held on to my reciept, which everyone I had dealt with thus far told me I needed or they wouldn't be able to do anything.
Denise already knew without me having to argue, hassle, or plead, that batteries are tracked by their serial number which records the sale date, which is all that is needed for the warranty to be valid (along with a government ID).
Here is the EverStart warranty that states this, for anyone wishing to learn more:
https://res.cloudinary.com/ds6xhrwmt/image/upload/v1708967353/Warranty/EverStart_Warranty_2024_rex0ms.jpg
