1. On the charging interface, the fast charging line is Type-C to Lighting, and the ordinary line is USB to Lighting, so the fast charging line and the ordinary line can be initially judged from the interface;
2, on the charging adapter, only the fast charge line can be matched with the fast charge adapter, that is, only the fast charge line supports Apple's PD charger;
3, charging power, the fast charge line provides higher charging power than the ordinary line, the ordinary line because it does not have the fast charge protocol, so the charging speed is slow.