Tile has user replaceable batteries on some of their products. Granted, it seems to be on their best sellers, but I somehow ended up with the thin ones, and I found out those don't have replaceable batteries after they died.
I swore Tile off when I found out the hard way that the battery gives out a year from time of sale, not from when you activate it.
> What if my battery dies early?
> We do not control the lifespan of your Tile; the battery is guaranteed to last a full year (or 3 years for Sticker and Slim) from your purchase date. Your Tiles are covered for 12 months by our worry-free warranty! If your Tile’s battery dies before a year has passed from the time of purchase, we’ll replace it free of charge. Our Customer Care team would be happy to help you!