Decreased iPhone battery health

I have an iPhone 13 Promax, the battery health of which is 78%, and I would like it to be 100% after replacement. Most of the repairmen say that the cost is high, but a repair shop has announced a reasonable price. Has anyone had the experience of repairing in this repair shop? https://apple-irani.ir

We appreciate your interest in participating in the forums! These forums are for questions about developing software and accessories for Apple platforms. Your question seems related to a consumer feature and is better suited for the Apple Support Communities

Decreased iPhone battery health
 
 
Q