PD means you can charge the system over USB-C.  
  This laptop comes with a barrel plug.  Can someone confirm the Inspiron 5425 laptop is able to be charged via usb-c? Is a 65 watt usb c brick safe to use?   from the manual the only thing I can see is somewhat vague: USB 3.2 Gen 2 Type-C port with DisplayPort 1.4 and Power DeliveryConnect devices such as external storage devices, printers, and external displays.Supports Power Delivery that enables two-way power supply between devices. Provides up to 15 W power output that enables faster charging
Inspiron 5425 charge via usb c?