The difference between fast charging and slow charging is a matter of time. Because the power of fast charge is relatively large, its charging time will be relatively short, and the power of slow charge is small, so the charging time is relatively long.
Difference: Different charging current per hour.
M5 supports fast charge and slow charge two charging methods, fast charge 45 minutes can make the power from 20% to 80%, slow charge 5 hours can make the power from 20% to 90%.