As kezo said, it’s a problem currently only seen in the EV3 and only then when charging at the full 7.4kW. You’ll get nowhere near that speed of charge at home. You’ll need to set the speed of charge to max at 6.6kW when/if you charge at a destination charger but you’ll be absolutely fine if you charge at a fast/rapid charger.
If usb is your only source of music, that could be problematic for the Mini. The only solution that springs to mind is if you have Amazon Prime for deliveries, that comes with a music subscription as well as the TV one. It’s not ideal but it’s marginally better than going without.
I'm Autistic, if I say something you find offensive, please let me know, I can guarantee it was unintentional.
I'll try to give my honest opinion but am always open to learning.
Mark