Charging and monitoring iPhone batteries

Charging and monitoring iPhone batteries

The iPhone has a built-in lithium-ion rechargeable battery to provide the best performance for your device today. Compared with the traditional battery technology, lithium-ion battery is lighter, faster charging speed, more durable, and higher power density, so the battery life is stronger. To understand how the battery works and make the most of its performance, please refer to the apple lithium ion battery website.
Charge the battery
To charge your iPhone, do one of the following:
Connect the iPhone to a power outlet using a charging cable (included) and an apple USB power adapter (sold separately). See power adapter for iPhone.
Place iPhone 8 and later on a MagSafe charger

or MagSafe dual charger (connected to Apple 20W usb-c power adapter or other compatible power adapter) or Qi certified charger. (MagSafe chargers, MagSafe dual chargers, power adapters and Qi certified chargers are sold separately.)
[note] you can also use third party power adapter and Qi certified charger that meet applicable national / regional regulations and international and regional security standards.
Connect the iPhone to the computer using USB.


Make sure the computer is turned on and if the iPhone is connected to a computer that has been turned off, the battery on the iPhone may run out without charging. Check the charging icon on the battery icon to make sure the iPhone is charging.

Connect the iPhone to a power outlet or place it on a wireless charger (supported models) to start icloud cloud backup or wireless computer synchronization. See backing up the iPhone and synchronizing the iPhone with your computer.

[note] do not try to connect iPhone to keyboard for charging unless the keyboard has a high-power USB port.

The battery icon in the upper right corner of the screen shows the battery power or charging status. It may take a long time to power up when you synchronize or use the iPhone.

If the iPhone is low, it may display an image of the battery that is about to run out, indicating it will take more than 10 minutes to charge to use. If the iPhone is extremely low when charging, it may be black for up to 2 minutes before displaying an image of the battery's low battery.

[warning] if you suspect that there may be liquid in the lightning interface of iPhone, please do not use this lightning interface to charge the iPhone. For information about liquid contact, as well as battery and other important security information for charging the iPhone, see the iPhone's important security information.

Display the percentage of battery remaining in the status bar

On iPhone with face ID: swipe down from the top right corner.

On iPhone with home button: go to Settings > battery, and turn on battery percentage.

Turn on low power mode

The battery life can be increased significantly by using low-power mode. Switch to low power mode when the iPhone is low or you may not be able to find power.

Go to Settings > battery.
Turn on low power mode.
Low power mode limits background activities and optimizes the execution of basic tasks, such as answering calls, sending and receiving emails and information, accessing the Internet, etc.
[note] if your iPhone automatically switches to low power mode, it will switch back to normal mode when the power is charged to 80%. In low power mode, iPhone may slow down on certain tasks.
Viw battery usage information
Go to Settings > battery.
Information about battery usage and activity over the past 24 hours and over the past 10 days will be displayed.
Information and advice: you may see information about the state of energy consumption or usage habits of the iPhone. Suggestions for reducing energy consumption may also be seen. If a suggestion appears, tap it to go to the relevant settings.
Last charge: displays the amount of charge the battery charged last time and the time the power is disconnected.
Battery power graph (over the past 24 hours): displays battery power, charging intervals, and periods when the iPhone is in low battery mode or battery is extremely low.
Battery usage graph (in the last 10 days): displays the percentage of battery power used per day.
Activity graphics: displays the activity over time, and sorts by screen on or off.
Screen on and screen off: displays the total activity when the screen is open and when the screen is closed within the selected time interval. The last 10 days view shows the average of the day.
App battery usage: displays the battery power ratio used by each app in the selected period of time.
App activity: displays the length of time each app is used in the selected period of time.

[note] to view the battery information for a specific hour or a day, please click the corresponding time period in the graph. To deselect, tap outside the drawing.
Check the health of the battery
Go to Settings > battery.
Light "battery health.".
The iPhone displays information about battery capacity, peak performance, and whether the battery needs to be serviced.
As time goes on, the capacity and performance of all rechargeable batteries, such as those in the iPhone, will decline. If your battery health is significantly reduced, Apple authorized service providers can replace the battery to restore battery performance and capacity.
Optimize iPhone Battery Charging
The iPhone has a setting that helps slow battery aging by reducing the time it takes to charge. This setting uses machine learning to understand your daily charging mode and then postpone charging to more than 80 percent until you need it.
Go to Settings > battery, and tap battery health.
Turn on optimize battery charging.