I've always just bought new batteries. They weren't expensive enough to bother with any redeeming a prorated warranty. If a battery goes out after several years, how much I going to get anyway? $10?
There are definitely car owners who have never dealt with battery warranties.
Sears has a nationwide network of car maintenance shops called Sears Auto Center that has been quite popular for tire, battery, and alignment work for decades.
Information about its warranty are printed in large letters on the side. It would be quite difficult to purchase this battery without understanding it has a warranty. This is not atypical. It is extremely common for batteries to have such information printed legibly on the side. Furthermore, car batteries typically have a punch out on the top designating the month and year of purchase. These are punched out at time of purchase and enable the warranty can be honored even in the event of losing one's receipt.
Battery displays in stores nearly always contain comparative information about the warranty periods, with premium batteries highlighted for having longer warranty periods.
I find it astonishing that people can buy batteries and never notice any of this, and some of these people are here claiming that owners whose Teslas become bricked are at fault because the manual obliquely suggests in an obscure section that bricking is possible, a possibility that is at the same time denied by the same group.
It says "3 Year Free Replacement". First, what does this have to do with the assertion about prorated warranties? Second, I don't know many people who have to replace their battery within three years.
The comment said the person felt people didn't know about battery warranties. But their existence is written on the side of the battery for brand names. Many Prorated ones like this Sears one have a period over which the prorated value is 100%. After the 3 years, the 100% declines on a linear slope, ending at 0% at 100 months. You could of course have looked this up rather than ranting and making dumb comments.
I think if you'll look back through the thread, I've made two brief comments demonstrating how your assertions that we should all know about prorated battery warranties are faulty. Others have made similar comments. This is neither ranting nor dumb.
If you don't want to be challenged on your assertions, you should probably find somewhere other than HN to make them. It's kind of what we do here.
There are definitely car owners who have never dealt with battery warranties.