Why does the iPhone charge to 80% and then not move?
In the course of daily use of iPhone, some users may find that the phone occasionally gets stuck at around 80% when charging and the power no longer rises. This phenomenon may be confusing and even worrying, but in fact, there are some reasonable explanations and design intentions behind it. This article will delve into this issue and provide you with some useful suggestions.
I. Analysis of causes
- Optimize battery charging function(Reasons in most cases)
- Smart Charging StrategySince iOS 13, Apple has introduced the "Optimize Battery Charging" feature. When this feature is turned on, iPhone will pause charging at night when the battery reaches 80%, and continue charging until it approaches your usual wake-up time, then continue charging until it reaches 100%. This is to minimize battery aging, as lithium-ion batteries tend to accelerate when they are kept at full capacity for a long period of time.
- Learning User Habits: iPhone will predict when you'll get up or access your phone based on your usage habits. It will finish the rest of the charge only shortly before you get up to ensure that the battery is at full charge for the shortest possible time.
- Battery Temperature Management
- overheating: The iPhone has a built-in temperature sensor so that when the phone gets too hot while charging, the device automatically adjusts the charging speed or even pauses charging to avoid overheating and damaging the battery. This is especially common when using the phone while charging.
- Poor charging environment: If your iPhone is in a hot environment, such as charging in direct sunlight, it may also cause charging to pause until the temperature drops.
- Battery Health
- Battery aging: The maximum capacity of the iPhone battery decreases as the usage time increases. When the battery ages, its charging efficiency decreases, charging slows down to 80% and even stops charging when it is close to full charge.
- Inefficient power adapter or charging cable: The use of non-original or lower quality chargers and cables may result in inefficient charging, causing the charge to be stuck at 80% no longer rising.
- System failure or software problems
- system error: Occasionally, there may be bugs in iOS that cause the battery level display to be abnormal, giving the illusion that charging is stuck. At this time, although the battery level display remains unchanged, charging may actually be complete.
- Background process interference: Certain applications may interfere with the charging process when running in the background, especially those involving high energy consumption, such as games or video playback software.
II. Solutions
- Check and turn off optimized battery charging(most cases)
- For iPhone 14 models and earlier, go to Settings > Battery > Battery Health & Charging, then turn off "Optimize Battery Charging.
- For iPhone 15 models, to choose between Optimize Battery Charging, 80% Upper Limit, and None, go to "Settings > Battery > Charge Optimization and select an option.
About the "80% Cap" for iPhone 15 models
For each iPhone 15 model, you can choose between Optimize Battery Charging, 80% Upper Limit, and None.
When "80% Upper Limit" is selected, iPhone will only charge up to approximately 80% and then stop charging. If the battery level drops to 75%, charging will continue until the battery level reaches approximately 80% again.
When "80% Upper Limit" is enabled, iPhone will occasionally charge up to 100% in order to maintain an accurate battery state-of-charge valuation.
- Improving the charging environment
- Avoid overheating: Try to charge your phone in a moderate temperature environment and do not leave it in direct sunlight or high temperatures.
- Avoid using while charging: Especially when using energy-intensive applications, try to avoid charging while using to prevent the device from getting too hot.
- Replacement of charging equipment
- Use original charger and cable: Ensure that you use official Apple chargers and cables, or MFi-certified third-party accessories, to ensure efficient and safe charging.
- Check charging equipment: If your charger or cable has been in use for years, you may need to replace it with a new device to ensure proper charging.
- Update or reboot your system
- Updating the system: Make sure your iPhone is running the latest iOS version, as system updates usually fix known bugs and optimize device performance.
- reboot: If you suspect that a system error is causing the abnormal power display, try restarting the device to see if the problem is resolved.
- Checking Battery Health
- Check Battery Health Status: Check the maximum capacity and peak performance status of your battery in Settings > Battery > Battery Health & Charging. If the battery health has declined significantly, you may want to consider replacing the battery.
III. Preventive measures
- Avoid extreme temperature environments
- Charging iPhone in extremely high or low temperature environments may affect battery performance. It is recommended to charge at room temperature and not to use the phone in extreme temperatures for extended periods of time.
- Regular calibration of batteries
- Fully discharging (up to 0%) and recharging up to 100% at regular intervals helps the iPhone system to more accurately display the power level.
- Using Power Saving Mode
- Enable "Low Battery Mode" to extend battery life and reduce battery consumption when charging is not possible.
IV. Conclusion
The iPhone pausing charging at 80% is a feature designed by Apple to extend battery life and reduce unwanted aging. In most cases, this is a normal phenomenon and not something to be overly concerned about. By understanding this feature and the reasons behind it, users can better manage their devices and take steps to ensure that their iPhones are charging properly when needed.
I hope this article can help you understand the reason why iPhone charging to 80% no longer rises. If you have any other questions or confusion, we recommend contacting Apple Customer Service or visiting an Apple Authorized Service Center for professional help.
