Longplay_Games, 
Hope the #fediverse can help with this:
Looking for a music player for a very specific edge case.
- Bluetooth
- MicroSD
- 8-9 hours battery
- Smaller than a mobile phone (or a phone would be used instead)
Been looking all over the internet and everything in this niche seems to either be very poorly reviewed or super sketchy.
It's for someone in a demanding/harsh job that precludes just using a mobile for music/audiobooks.