I have a Xiaomi Portable Electric Air Compressor 1S to give away.  Worked perfectly but the batteries have now died after little use.  Was working perfectly fine until they died.  So good for someone that is willing to pull it apart and chuck in a fresh set (I dont have the equipment needed to be trying to spot weld the batteries).  Charges off USB-C.  Does not retain charge.

Specs for it are here:  Xiaomi Portable Electric Air Compressor S1

This would be pickup only from West Auckland. I should have the accessories as well if needed.

Heres a video on the battery replacement:  https://www.youtube.com/watch?v=AZ2hRiwI2NQ  
As far as i know it uses 2x18650's.