Replacing your iPhone battery is not cheap: It costs $49 for older iPhones or $69 for the iPhone X and later, if you buy directly from Apple. An Apple Authorized Service Provider can service the battery. More about service options… This iPhone is unable to determine battery health.Health information not available for this battery. Learn more… Unable to verify this iPhone has a genuine Apple battery.An Apple Authorized Service Provider can replace the battery to restore full performance and capacity. Your battery’s health is significantly degraded.You have manually disabled performance management protections. This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power.Performance management has been applied to help prevent this from happening again. Disable… Your battery is currently supporting normal peak performance.Message number four is the only one that specifies that your battery is severely degraded and should be replaced. The iPhone’s Battery Health feature can deliver several messages that give you a good idea of the current condition of your battery. The feature is included with iPhone 8, 8 Plus, and X with iOS 12.1, and in iPhone XS, XS Max, and XR with iOS 13.1. If you disable performance management, you can’t turn it back on, but it will automatically start up again in the event of another unexpected shutdown. This feature is enabled only after an unexpected shutdown on a device whose battery peak power is diminished. You can observe whether the performance management feature, which manages the iPhone’s maximum performance and prevents shutdowns, is enabled and you can switch it off on any iPhone 6, 6 Plus, 6s, 6s Plus, SE, 7, and 7 Plus. If capacity falls below 80%, Apple recommends replacing the battery. A range of that percentage is normal, though a healthy battery should retain about 80% of its original capacity at 500 charge cycles. Maximum Capacity is a percentage that measures current capacity versus 100% when your battery was new. When you tap on Battery Health, you can easily see the relevant statistics. You can also disable the performance management feature, though you may risk unexpected shutdowns if your battery is degraded. Starting with iPhone 6 and iOS 11.3 you can go to Settings > Battery > Battery Health to find a tool that reveals significant information about the current condition of your battery, and recommends if a battery should be replaced. In late 2017, Apple acknowledged it had deliberately and secretly throttled some of its older phones to stabilize performance caused by aging batteries.
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