Below is how to replace the battery on the Opple remote. It’s not as easy as it is with the others, but it’s still pretty simple. You can use a spudger or a flat head screw driver

First remove the middle key with the spudger, if you push down on one of the sides it makes it easier to lift the other

Now remove the screw from the middle.

Now remove the top button. The keys are held on by clips in the middle so be careful. We only need to remove these two

Now with the top off you can pull the cage off, you might have to pry a bit

Now with the cage off you can pull the PCB out and the battery will be on the bottom, they take the normal cr3032 batteries.