iPhone battery health naturally declines over time, but certain factors like iOS updates, using the phone on low battery, background services, and push notifications can speed up this process. By avoiding low battery levels, disabling unnecessary services, and protecting your phone from extreme temperatures, you can prolong battery life. If your battery health drops significantly, consider visiting Zam Zam Mobiles UK at 153 Ilford Lane, London, for a professional battery replacement. Learn more about why this happens, how to prevent it, and a comparison between iPhone and Samsung batteries in this detailed guide.