If the battery health of Apple mobile phone drops below 80% within one year after purchase, you can replace the battery for free. This is Apple's warranty policy for mobile phone batteries, which aims to make users enjoy a longer service life of their mobile phones. This policy applies not only to iPhone purchased in Apple direct stores and authorized repair points, but also to contract machines purchased through telecom operators. It should be noted that this safeguard policy is limited to the case that the battery health status drops below 80%. If the battery health is above 80%, the battery cannot be replaced for free. Users can check the battery health of Apple phones in the following two ways:
1. View in mobile phone settings: Go to Settings-Battery-Battery Health to view battery health.
2. View through third-party software: Search for "Battery Health" in the AppStore, and you can view the battery health after downloading and installing.