Does anyone actually read the warranty paper before buying or just me after something breaks?

[simregistration]

I'll be honest, I never used to care about battery. I'd walk into a shop, ask for whatever fits my car, pay, and leave. Didn't even look at the papers they handed me. That changed last month when my battery died after only nine months. I went back to the same shop and the guy started asking me all these questions I couldn't answer. Did you register the warranty online? Did you get the battery tested at six months? Do you have the original box with the barcode? I had nothing. Just a faded receipt that barely shows the date. I felt so stupid standing there while he explained that I missed three different steps to keep the warranty valid. That's when I realized I've been doing this wrong my whole life. So I went home and started searching for what I should actually do next time. I found a lot of confusing advice but then I came across this page dubaiweeklys.com/car-battery-warranty-guide which broke everything down in a way that actually made sense to a normal person like me who isn't a car expert. What surprised me most was learning that some require you to keep the battery at a certain charge level or they won't cover failure. Who checks that regularly? Anyway, my question for you is all simple. When you buy a new battery, what's the very first thing you do to make sure you don't get rejected later? Do you take photos? Save the receipt on your phone? Ask the shop to explain the rules in writing? I really don't want to get caught again.