Just to clarify and a word of caution to anyone that may consider this suggestion in a pinch - two of the CR2025 stacked would result in a 6v battery which could fry a device designed for 3v.
They are two different fob styles. 2015/2016 used the older style (with 2x 2025 batteries) while 2017+ started using the newer type with a single 2450 battery.
My 2016 came with the older type and I added fob of the newer style. You can see them side by side In this post I made at the time.
Interesting. I pulled out two 2025's out of each fob. And replaced them with 2025's. One went easy, and the batteries fit right in. The other one did have a little trouble holding the top battery, but both fobs work just fine now. Maybe the 2016 used the 2025?? I don't know, but they both work now.
The Edge FOB takes CR2450 batteries.
they are 24mm diameter and 5mm thick
The CR2025 is 20mm diameter and 2.5mm thick. Two of those can work in a pinch, but the diameter can be an issue.