The iPhone's battery uses lithium-ion technology. Compared to older generation battery technology, lithium-ion batteries charge faster, last longer and have a higher power density for longer life in lighter housings. Rechargeable lithium-ion technology currently offers the best technology for your equipment. Learn more about the battery of the iPhone.
How to maximize battery performance
"Battery life" is the time the device will run before it needs to be recharged. “Battery life” is the time that the battery lasts until it needs to be replaced. One factor that affects battery life and service life is the variety of operations you take with your device. No matter how you use it, there are ways to help. The life of a battery is related to its "chemical age", which is not just a matter of time. It includes different factors such as the number of charge cycles and the charge cycle. Follow these tips to maximize battery performance and extend battery life. For example, when the iPhone is stored for a long time, please keep it half-charged. Also, avoid charging or leaving the iPhone in a hot environment, including prolonged exposure to the sun.
Prevent unplanned downtime
Users are more likely to experience unplanned downtime due to lower battery state, higher chemical age or lower temperatures. In extreme cases, shutdown may occur more frequently, making the device unreliable or unavailable. For iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7 and iPhone 7 Plus, iOS dynamically manages performance spikes to prevent accidental shutdown of the device so that the iPhone can still be used. This performance management feature is specific to the iPhone and does not apply to any other Apple product. Starting with iOS 12.1, the iPhone 8, iPhone 8 Plus and iPhone X all include this feature, but due to its more advanced hardware and software design, performance management may not be obvious.
This performance management works by looking at a combination of device temperature, battery state of charge, and battery impedance. Only when these variables require it will iOS dynamically manage the maximum performance of certain system components (such as CPU and GPU) to prevent accidental shutdown. As a result, device workloads will be self-balancing, allowing for a smoother distribution of system tasks rather than a one-time larger, faster performance spike. In some cases, users may not notice any difference in daily device performance. The extent to which changes are perceived depends on how much performance management is required for a particular device.
In cases where more extreme forms of performance management are required, users may notice the following effects:
Longer application startup time
Reduce frame rate while scrolling
Backlight dimming (can be covered in the control center)
Speaker volume is reduced by -3dB
Some applications gradually reduce the frame rate
In the most extreme cases, the camera flash will be disabled in the camera UI
Apps that are refreshed in the background may need to be reloaded at startup
Many key areas are not affected by this performance management feature. Some of them include:
Cellular call quality and network throughput performance
Captured photo and video quality
GPS performance
Position accuracy
Gyros, accelerometers, barometers, etc.
Apple Pay
For low battery state of charge and lower temperature, performance management changes are temporary. If the device battery is chemically aged far enough, performance management changes may be more permanent. This is because all rechargeable batteries are consumables and have a limited life and need to be replaced. If you are affected by this and want to improve the performance of your device, it may be helpful to replace the device battery.
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