How do I increase the maximum capacity of my battery?
A normal battery is designed to retain up to 80% of its original capacity at 500 complete charge cycles when operating under normal conditions.
Can iPhone battery capacity be increased?
Optimise your settings.nnThere are two simple ways you can preserve battery life — no matter how you use your device: adjust your screen brightness and use Wi-Fi. Dim the screen or turn on Auto-Brightness to extend battery life.