Link?

Fiio has a few well regarded contenders but I am unsure if they have batteries that are replaceable.

Thank you

That is really interesting, what is the name of the podcast?

Yeah I kind of do the same. I call it a weekly review note, but really is has all tasks and notes of every week (of that year organized by headers) in bullet form sort of working like my top top level MOC. I fill it out on Mondays where I look at my calendar and pop in every event of the week, and then I can fill it out or turn every bullet into a new note as needed.