Questions about Air 2s

Hey Guys,

I recently got the Air 2S glasses, and while I'm overall enjoying them, I did have a few questions that I was hoping someone could help with.

1. Do these have an internal battery that needs to be charged? They don't seem to display anything without a phone plugged into them, so I was wondering if they are just leeching power from the phone? Or if I need to charge the glasses separately?

2. I can't get the audio to work on these glasses. Whenever I plug by S24 Ultra in, it goes right to DeX, but the audio remains on my phone or bluetooth earbuds. Nothing I have done has got the audio working. I also tried using the adapter that does mirroring instead of DeX, but no audio there either. Am I doing something wrong? Is there something specific I have to do to enable audio? Or is there something wrong with my glasses?