The ZTE Nubia Z17 phone can be charged using its own Qualcomm Quick Charge charger as well as other USB Power Delivery based power supplies like the BatPower PD6's AC Adapter as seen recently. We now use the BatPower PD6 Power Bank with the Nubia Z17 to see how well they perform over USB Power Delivery.
By connecting the BatPower USB Type-C Adapter in between the BatPower PD6 and Nubia Z17, we can see the BatPower repeatedly declares that it can deliver 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps ), 36 watts (12 volts @ 3 amps), 45 watts (15 volts @ 3 amps) and 60 watts (20 volts @ 3 amps) over USB Power Delivery. Note the BatPower PD6 is unable to supply up to 90W as seen on its casing.
During the initial plug in at 10% full battery, the Nubia Z17 is seen to charge to around 15 watts (5 volts @ 3 amps) in the first 55 seconds. After that the voltage level increases to 9 volts but the current pulled drops down to 1.6 amps to charge at only 11.3 watts. The phone later pulls around 16 watts (9.2 volts @ 1.75 amps) as charging goes on.