iPhone 12 and iPhone 12 mini Battery Replacement Below 90% Capacity

iPhone 12 mini battery getting replaced. The old battery has 91% capacity left and the new battery has 100%. We need to remove the screen to access the bad battery and install a new battery. The 12 mini has a small battery and the capacity decesare rapidly if you use higher wattage chargers. The battery replacement difficulty of this device is 6 out of 10. The main thing to be careful about is the screen that need to come out first to access the battery. It is critical to take your time while removing the screen because these iphones screens are medium fragile and one bad move can crack something.