I use Jellyfin which covers all my personal streaming needs. But yeah, still not the same

I hate depending on an Internet connection and listening to ads (even as a paid customer), so local media is the only solution for me. And it’s getting so hard to find phones with SD cards that I might have to start carrying around an MP3 player too.

I have a couple iPod classics, one has a dead battery but the other runs just fine. What all are the options for keeping these alive?