The charging speed of flash charger is affected by many factors, such as battery capacity, charger power, wire quality, charging device temperature and so on. If the battery is close to full charge, the charging speed is slowed down to avoid damage caused by overcharging. Flash charging technology can improve charging efficiency and speed, but it also needs to be compatible with the battery and charger. In addition, the use of counterfeit chargers or wires will also reduce the charging speed and safety. Therefore, users should pay attention to quality and technical compatibility when selecting charging equipment, so as not to affect charging speed and mobile phone life.