Save State Question

This one is a bit specific to oracle or seasons / ages. I just dug up these games from my attic and realized that the battery still seems to work as the saves are still there.

I don’t have a lot of free time to think about changing batteries at the moment but was wondering if doing a simple save state on this screen would do the trick to preserve my 3 files and avoid losing the saves if the battery dies.

Was not sure if I would have to save during gameplay or the title screen would be enough.

Any help would be appreciated.