Current iPhone models, when using fast charging and a powerful adapter, can replenish half the battery charge in about 30 minutes. You can charge your smartphone even faster if you temporarily turn off charging of all modules and reduce the screen brightness.
Topic: Using some kind of power supply will charge your iPhone faster. Tested different options
Turn everything off and on manually every time for this special suit. It will come in handy if you need to quickly refill your smartphone battery before going to work or while having lunch in a cafe.
How to enable the fastest iPhone charging mode
1. Download the free Teams app.
2. Download the original command from the link or the modified version without voice links.
3. Save the command and click the three dots to make changes.
4. In Settings, disable options that you don’t want to use when you enable fast charging. By default the command does the following:
▶ turns on airplane mode;
▶ turn off Wi-Fi;
▶ turns off Bluetooth;
▶ screen brightness up to 25%;
▶ Enables standard iOS power saving mode.
After this, the internal timer starts for 30 minutes. This will be enough to charge your iPhone very quickly. After 30 minutes, a window will appear in which you can extend the mode for another 15 minutes or turn on all communication modules again and return the previous screen brightness.
5. Save the commands with your changes and the widget to your desktop for quick launch.
If you want to automatically turn on the command when connected to charging, you can set up automation using these instructions.
Source: Iphones RU

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