The advantage of fast charging is that it is fast and saves time, and the disadvantage is that the damage to the battery is greater than that of slow charging; The advantage of slow charging is that it damages the battery less than fast charging, and the disadvantage is that it takes time. Fast charging is not the loss of battery that many people think, because mobile phone manufacturers have adjusted the charging strategy, such as maintaining high power fast charging for the first 20 minutes, and then slowing down when the phone power reaches a certain degree, or even becoming slow charging, which can greatly reduce the hidden danger of damage to the battery.