Starting with iOS 12.1, iPhone 8, iPhone 8 Plus, and iPhone X include this feature iPhone XS, iPhone XS Max, and iPhone XR include this feature starting with iOS 13.1. The effects of performance management on these newer models may be less noticeable due to their more advanced hardware and software design. This performance management feature is specific to iPhone and does not apply to any other Apple products. For iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE (1st generation), iPhone 7, and iPhone 7 Plus, iOS dynamically manages performance peaks to prevent the device from unexpectedly shutting down so that the iPhone can still be used. In extreme cases, shutdowns can occur more frequently, thereby rendering the device unreliable or unusable. With a low battery state of charge, a higher chemical age, or colder temperatures, users are more likely to experience unexpected shutdowns. While this shutdown is intentional from the device perspective, it may be unexpected by the user. When the operations can no longer be supported with the full capabilities of the power management system, the system will perform a shutdown to preserve these electronic components. The power management system determines the capability of the battery to supply this power, and manages the loads in order to maintain operations. This includes the device’s internal storage, power circuits, and the battery itself. ![]() Electronic components require a minimum voltage to properly operate. When power is pulled from a battery with a higher level of impedance, the battery’s voltage will drop to a greater degree. These are characteristics of battery chemistry that are common to all lithium-ion batteries in the industry. When coupled with a higher chemical age, the impedance increase will be more significant. A battery’s impedance will temporarily increase at a low state of charge and in a cold temperature environment. A battery's impedance can increase if a battery has a higher chemical age. A battery with a high impedance may be unable to provide sufficient power to the system that needs it. One attribute that affects this instantaneous power delivery is the battery’s impedance. In order for a phone to function properly, the electronics must be able to draw upon instantaneous power from the battery. In addition, a battery’s ability to deliver maximum instantaneous performance, or “peak power,” may decrease. This can be referred to as the battery’s maximum capacity-the measure of battery capacity relative to when it was new. The iOS 10.2.1 update is available for the following devices: iPhone 5 and later, iPad 4th generation and later and iPod touch 6th generation and later. The software update is about 72MB in size so you will not need to clear out much space on your devices.All rechargeable batteries are consumable components that become less effective as they chemically age.Īs lithium-ion batteries chemically age, the amount of charge they can hold diminishes, resulting in shorter amounts of time before a device needs to be recharged. You can install iOS 10.2.1 by connecting your device to iTunes or downloading it by going to Settings > General > Software Update. The "Theater Mode" feature is reportedly going to be controllable with one tap on a popcorn-shaped icon. Forbes contributor Gordon Kelly speculates that it would optimize the video viewing experience by dimming the screen and muting notifications. For example - iOS 10.3 is believed to have a new feature called “Theater Mode,” which is expected to be some form of enhanced Dark Mode. ![]() When iOS 10.3 arrives next month, it will be a much bigger release. There is also a fix for an issue that causes an activation-locked device to be manipulated into briefly presenting the Home screen. Update: Apple’s security page for iOS 10.2.1 says that the software update addresses under-the-hood kernel improvements and bugs that cause Auto Unlock to unlock when the Apple Watch is off the user’s wrist and issues with malicious contact cards that can crash the Contacts app.
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