Anker SoundCore Liberty Air 2 Pro Earbuds Lot - not working

For parts or repair / the headphones are not working or may work but have sound issues.  The cases do not charge or will not hold a charge.  Selling as a lot for parts or repair. 12 headphones and 4 cases. 16 total. Four of the headphones are not Liberty Air 2 pro, but a different model Soundcore.