The difference between fast charging and slow charging is the charging speed and charging method. Fast charge can charge the battery in a short time, the charging speed is fast, and the battery can be fully charged in 30 minutes. Slow charging takes a longer time to complete, usually several hours or more. In addition, fast charging usually uses high-power charging devices, while slow charging uses low-power charging devices. Therefore, fast charging is suitable for situations where charging is urgently needed, while slow charging is suitable for long parking periods or overnight charging.