The difference between fast charging and slow charging is mainly in charging power and charging time. Fast charge means that the mobile phone uses a high-power charger to charge, charging speed is fast, but at the same time, it will also produce a large amount of heat, which may affect the battery life.
Slow charge refers to the use of a low-power charger to charge, charging time is longer, but the damage to the battery is less, which can extend the service life of the battery.