My phone runs out of batteries too quick and I hate the apple podcast apps so I do it oldschool with an MP3 player. I use clementine (free podcatcher) https://www.clementine-player.org/ on my computer to download podcasts, then drag/drop the Mp3s into this thing: https://www.amazon.com/gp/product/B01LRXHO48/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Once a week (in summer) I sit in my yard and have a few drinks while listening to mysterious universe and use this speaker to do so (connected to my mp3 player) https://www.amazon.com/gp/product/B007NJ3SIM/ref=oh_aui_search_detailpage?ie=UTF8&psc=1.