Can be turned on.
Because Samsung S21 series mobile phones have reverse wireless charging function, you only need to turn on in the Settings.
The specific steps are as follows: Go to Settings - Advanced features - Pairing and sharing - Reverse wireless charging, after opening, you can use the phone as a charger to charge other devices.
If your device charging mode supports wireless charging reception, then you can use the Samsung S21's reverse wireless charging function to charge it, which is very convenient.
Note: Reverse wireless charging will affect the battery consumption speed of the mobile phone. It is recommended to use it when necessary to avoid affecting the use experience.
Samsung s21 reverse wireless charging turn on method
Step 1. First of all, you need to find [Settings] in the mobile desktop and click to enter
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Step 2. Next we can find the [battery] option from the page
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Step 3. Then we need to turn on the switch on the right side of [wireless reverse charging]
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Step 4. Finally, we just need to open the device that needs to be charged and put it on the back of the phone to start charging
To turn on the Samsung S21 reverse charging, you need to pull down the shortcut menu at the top of the screen, and then find the wireless power sharing icon. After clicking the icon, the phone that needs to be reversed charged can be charged back to back.