Low-Battery Warning for Apple Magic Mouse and Magic Keyboard

I'm really disappointed that there is no way to set a notification for the Magic Mouse and Magic Keyboard battery level. 10% or 2% isn't enough battery life for me to get through the day before plugging in. I need a reminder that pops up at 20%. Ideally this reminder could be snoozed until a time I can set, so when I'm done working, I can plug in my mouse for an hour or two before shutting down my Mac.

I found this tutorial for setting a new low-battery reminder through the command line: https://dev.to/samselfridge/magic-mouse-low-battery-alert-4mdo

The replies to other threads on this topic that said "just monitor in your bluetooth settings and keep an eye on the battery life" definitely won't work for anyone who has an executive function deficit, like me.