I'm going to vent here. Opening up the Key Fob for my 2021 is next to impossible. Manipulating the small black lever and sliding the cover is very difficult if not nearly impossible. Then opening the cover for the battery isn't easy unless you have a very small tool.
I thought about how difficult it would be to open the Key Fob at night standing next to the car to access the key. My solution, get rid of both covers and use duct tape. Perfect solution.
I hope Volvo has done away with this terrible design.