OWC's USB-C Dock supports USB Power Delivery technology, so we decided to see if it could charge the Lenovo's Moto Z Droid. Using software from Granite River Labs, we were able to clearly see what was communicated between the OWC USB-C Dock and the Moto Z Droid.
The OWC USB-C Dock offers 10 watts (5 volts, @ 2 amps), 36 watts(12 volts @ 3 amps), or 60 watts (20 volts @ 3 amps) of power.
The Moto Z Droid then only requested 5 volts @ 2 amps from the OWC USB-C Dock and then this protocol negotiation cycle repeats a second time
Through the oscilloscope we see the following waveforms upon connecting the Moto Z Droid to the OWC USB-C Dock when the phone is low on battery.
The promised 5 volts dropped to 4.5 volts as the current spiked.
The current temporarily rose to the promised 2 amps, but then dropped to 1 amp afterward which was not the 2 amps current requested by the Moto Z Droid.
We then decided to see how long it would take for the dock to charge the phone.
Connecting the OWC USB-C Dock to the Moto Z Droid when it was at around 6% battery, we saw that it took less than an hour to fill the battery up to about 50%.
In the end it took over two hours to fully charge the phone. It's not clear why 2 amps of current was not provided to the Moto Z Droid as requested from the OWC USB-C Dock to allow faster charging.