Tile, the find your things device maker, recently launched two new Tile devices with replaceable batteries. The Tile Mate, with a 150-foot range, and the Tile Pro, with a 300-foot findable range. Both now have easy to change, replaceable coin batteries. The older versions just required buying a new Tile (lame!). See my full review of the best key finder at our sister site.
The Tile Mate requires a CR1632 battery. It’s quite small, but easy to replace. I’d suggest a small flathead screwdriver or a paperclip to remove the battery.
The Tile Pro requires a CR2032 battery. A little larger diameter battery, but the same thickness as it’s smaller little brother the Tile Mate.
I created a short video showing how to replace the battery in both the Tile Mate, and Tile Pro: