Why cannot the Xiaomi 14T be turned on when the charger is connected while powered off?

When the battery is depleted, the phone powers off to protect its components and prevent potential damage. With the built-in battery protection mechanism, the phone will be shut down before the battery reaches a critically low level.
The feature of immediately turning on when being charged when the battery is depleted requires two conditions:
1. The phone must be at 1% battery or lower before powering off and the battery must not be depleted, otherwise, it will not turn on when being charged;
2. The feature of immediately turning on when being charged when the battery is depleted behaves differently with various chargers. It is recommended to use a Xiaomi 67W or higher charger when the phone is off at below 1% battery to utilize this feature. If the phone has been off for a long time (e.g., a newly purchased device), the battery will be in a depleted state, which will require additional time to charge and power on it.