Doesn't that just mean you have a particularly good warranty? It would not make sense for the warranty to last significantly longer than the expected lifetime of the product, so the only alternative would be to have a warranty that explicitly lasts much less than the expected lifetime. This seems strictly worse than the alternative!
Usually if you buy a product with a one year warranty you don't expect it to be unusable after 13 months. I don't know if they can swap batteries though, that would change things.