How to disable frequency reduction in IOS 11.3 how to check the battery health of IOS 11.3
4hw.com.cn: after the IOS 11.3 upgrade, the battery health (test version) you care about can be used in IOS 11.3 and later, and can be displayed on all iPhone models above iPhone 6. Users upgrading to a new version of IOS can see the estimated battery capacity of the system and show you if the battery can provide the best performance.
After the update to IOS 11.3, turn on the system settings - battery, you can see the battery health (beta version), click in to see the current battery capacity and peak performance capacity evaluation, in addition, apple specially built in the battery loss instructions here. If the peak performance capacity of your battery is normal, the system will only display "your battery currently supports normal peak performance", in fact, no specific value will be displayed. If the battery can no longer provide peak power output, when the system encounters an unexpected shutdown for the first time, performance management will limit the CPU, and the running speed of the device will be automatically adjusted. If necessary, the user can disable droop, which is what we usually call frequency droop.
Apple said the battery management system will have better adaptability and will minimize the frequency reduction or battery impact on the new iPhone. Starting with iPhone 8 and iPhone x, including new hardware upgrades in the future, IOS's battery management will be adjusted in more detail as needed, so the performance limitations on new devices will be far less obvious than those of the old iPhone.
The battery maximum capacity reading gives an estimate of the current total capacity of the battery. The capacity of the new iPhone is 100%. Generally speaking, the capacity of the iPhone that has been used for more than one year will be more than 80%. If this value is low, it means that your battery is too old. "Peak performance capacity" determines whether the system will automatically enable frequency reduction. Note that peak performance may not be related to the maximum capacity of the above battery, because some 80% or even 95% of the batteries may also have insufficient peak performance leading to unexpected shutdown, because it is determined by your model and the running application.
When the iPhone encounters an unexpected shutdown, the frequency reduction is turned on. After the iPhone is restarted, a notice will pop up on the lock screen to inform the user of the shutdown due to the insufficient peak capacity of the battery - "this iPhone has experienced an unexpected shutdown because the battery cannot provide the necessary peak power.
Battery management will be activated to prevent this from happening again '. If you are willing to take the risk of an unexpected shutdown, you can disable it after you have a good understanding of the situation.