Charging speed
PD charging cable is integrated with quasi-resonant current mode controller and power MOSFET built in, which has the characteristics of high performance, low standby power consumption and low cost.
But for the normal charging cable, The specification is 5V2A with constant current and voltage charging mode, the charging speed is slow.

Current switching after charging is over
The chip inside the PD charging cable can control the charging process, it will stop automatically once the charging is full, making the whole charging process more safe and efficient.  
As for the normal cables with 5V2A, When the battery is full, it automatically changes to trickle charging state.
For PD charging cables, the best efficiency under the full voltage range is achieved by using the mixed modulation technology of QR-PWM, QR-PFM and burst-mode and the low-power structure technology of special devices.  
At the same time, it provides comprehensive and excellent performance of intelligent protection functions, including output overvoltage protection, periodic overcurrent protection, overload protection, soft start function. 
The normal charging cables with less components and simple designs, there are
internal integration of 650V intelligent power MOSFET with high avalanche capacity built in, The circuit design is simple and easy to implement also the price is low. Please choose to buy from the reputable retailer.