First, you can directly take the method of plugging in the mobile phone direct charging data cable, wait for a while you can restart the activation, but the charging needs to be charged to more than 5% in order to start normally.
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Second, if the battery is fully charged and still cannot be turned on normally, it may be the reason for the mobile phone software system, then you can try to press the Home button and the power button of the home screen of the phone at the same time, until the screen is lit up.
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Third, if this method is not possible, you can also connect the phone to the power supply, and then press the power and Home button at the same time to see if you can restart.
Battery starvation refers to the condition in which the battery runs out of power and cannot start the device. To activate the battery, try the following:
1. Connect the device to the power adapter and charge it, wait for a period of time and try to turn it on.
2. Connect the device to the computer using the original charger and data cable, and then try turning it on.
3. Hold down the device's power button and volume down button for about 10 seconds at the same time until the Apple logo appears, then release the button. If the above methods do not work, you may need to replace the battery or seek Apple's official after-sales service.