Mobile phone battery charging time

The cell phone battery is equipped with a protective plate, which will automatically power off when conditions are met
A. Overcharge protection. That is, the battery will automatically stop charging when it is full
B. Overdischarge protection. That is, the battery will automatically stop discharging when it uses 3.2V
C. Short-circuit protection. That is, the battery will automatically disconnect if it is accidentally short-circuited
That is to say, the average battery is full within 2-3 hours of charging. When it is full, the charging circuit has actually been disconnected. So it is meaningless