Usually, for electronic devices I start with the Open Source Projects recommendations or first class support items... They usually have good hardware quality e.

Usually, for electronic devices I start with the Open Source Projects recommendations or first class support items... They usually have good hardware quality e.g. for a smartphone, I look at lineage devices first and then check out reviews for these, that work for me from looking at the specs. For your purpose, there is no such audio player, I know of. The best devices I know atm are: - iPod Nano 7th gen 16GB - Pro: Size, Bluetooth, UI - Con: Battery, Storage, Formats, req. iTunes, no Wifi / NFC, No Upgrades - iPod classic (mod with iFlash Quad and 2200mah battery + iKokkia Bluetooth) - Pro: Storage, Battery, UI, Hackable (kind of) - Con: Size, Formats, req. Itunes, No native Bluetooth/Wifi/NFC, No upgrades - Maybe you should think of RockBox to have more freedom - LG G5 H850 (optional with Bang & Olufsen Hifi-Plus module) + Audiobookshelf + Substreamer - Pro: Formats, Battery, Storage, Bluetooth/Wifi/NFC, Hackable - Con: Size, UI (I did not find a Server/App nearly as good as iPod) Let me cite my comment from https://news.ycombinator.com/item?id=32042780 https://news.ycombinator.com/item?id=32042780: I use m4b-tool[1], tone[2] and audiobookshelf[3] together with an LG G5 H850 smartphone[8] with Bang & Olufsen Hifi-Plus Module for Audio Only and I am pretty happy with this config. For Music I use Navidrome[5] and Substreamer App[7]. Maybe I'll try out Jellyfin[4] or maybe Plex[6], but I really don't wanna go closed source. I also thought about writing something self hosted in C# to have ONE solution for audiobooks, podcasts and music and started a small private project, but this will take a while until it is ready to release something... You may ask: Why an LG G5 H850? Well, its relatively small and cheap (about 50 - 80 bucks used) it has an audio Jack, USB-C, you can change the battery, it can hold up to 2TB microSD storage, has an HiFi Plus module for audio enthusiasts and a descent screen. Besides that it can run lineage os... Note: I'm the author of the first two projects :-) [1]: https://github.com/sandreas/m4b-tool https://github.com/sandreas/m4b-tool [2]: https://github.com/sandreas/tone https://github.com/sandreas/tone [3]: https://github.com/advplyr/audiobookshelf https://github.com/advplyr/audiobookshelf [4]: https://jellyfin.org/ https://jellyfin.org/ [5]: https://www.navidrome.org/ https://www.navidrome.org/ [6]: https://www.plex.tv https://www.plex.tv [7]: https://substreamerapp.com/ https://substreamerapp.com/ [8]: https://en.wikipedia.org/wiki/LG_G5 https://en.wikipedia.org/wiki/LG_G5