When the Xiaomi 14T Pro's battery is fully depleted and you plug it into an adapter, you can notice that the phone remains off for a period of time. This behavior can vary depending on the type of adapter you are using. If you connect the device to an official high-power adapter, it can turn on within four seconds after being plugged in.
However, if you use an unofficial adapter, a PD (Power Delivery) adapter, or a QC (Quick Charge) adapter, the phone can take longer to boot up. In contrast, using a low-power adapter or a computer USB port will lead the phone to first display a charging interface and remain in that state for a while before powering on. To fully take advantage of this feature, it is recommended to use the standard adapter that comes with the device. This ensures a smoother experience when reviving your phone after a complete battery drain.