How does a car battery warranty work?

I bought a new car battery less than a year ago. It had a 2 year replacement warranty. The store replaced the battery with a new one since the old one died, but said they could not give me a new receipt giving me another 2 years on the new one. So now I have a new battery stating it has a 2 year replacement warranty but actually only a year left on the original date of purchase. Is this the way all battery warranties work?|||if they replace the battery then the warrenty starts all over agian. if the battery fails in that amount of time, it is covered by the manufacturer because they should last the length of the warrrenty, otherwise it doesnt meet their standards therefore, they replace it. And the warrenty starts over again.|||i used to work at advance auto parts, and the free replacement only lasts from the original date of purchase, so if you buy a battery with a 3 year 84 month prorated warranty, and you need to replace the batt 2 years in, that does not entitle you to another 3 year free warranty|||Had that happen with a Wal-Mart batt.





Could not find the receipt but, there was a manufacture date on the side of the batt and they went by that.