Coconut battery showing diffrent residua design capacity, by the hours

Coconut is telling us the battery is near failure 'Check Battery'

We could try to salvage it by discharging it the rest of the way first, then resetting SMC, then allow the system to fully charge once again and then discharge fully and recharge still one more time following this guide: Calibrating Your MacBook, Air, or Pro Battery.

I must warn you its possible the battery won't recover here at which point you'll need a new battery. You see its possible one cell has gone so our efforts may not save it and could in fact push it over the edge.

Given the state its in not much of a loss as long as you can get a battery! Which gets into where you are located on this big blue marble as IFIXIT or other suppliers can't ship to some locations (surface transit only). So make sure you have an option 'B' plan before doing this.