Start from the simplest way, stepwise recover a locked Mavic Air battery due to prolong storage.
We don't need to fully disassemble the battery, just open the top cover to expose the electrodes of the cells. Basic soldering technique will be required.

Extra hardware:
CP2112 board will be needed to unseal the battery.

Extra software:
DJI battery killer, that use with the CP2112

References
DJI Dead Battery - Fix with CP2112 adaptor -- ANTHONYVLOG
   • DJI Dead Battery - Fix with CP2112 ad...  

Mavic Air Battery Recovery -- Philip John
   • Mavic Air Battery Recovery