GTrusted

Both the Razer Blade Stealth and Plugable Thunderbolt 3 Docking Station with Power Delivery support USB Power Delivery technology through the Thunderbolt 3 based USB Type-C port, so let's see how well the Plugable dock charges the Razer notebook PC while docked using USB Power Delivery on a 36% charged battery.

Using a Thunderbolt 3 cable, we plug in the Razer Blade Stealth to the Thunderbolt 3 host port on the Plugable Thunderbolt 3 Docking Station with Power Delivery that is labeled with a computer logo. This port is used for charging the PC at high power while the other Plugable Thunderbolt 3 port comes with only standard 15 watts and no additional charging support.

When observed through the Granite River Labs GRL-USB-PD-A1 apphttp://graniteriverlabs.com/usb-pd-a1/, the Plugable dock starts USB Power Delivery negotiations after Vendor Defined Messages by offering a single 15 watts (5 volts @ 3 amps) power profile.

For some reason, the Razer Blade Stealth initially requests zero power (5 volts @ 0 amps) which the charger accepts.​

We then observe several Vendor Defined Messages being exchanged after which the Plugable Thunderbolt 3 Docking Station with Power Delivery eventually offers not only the 15 watts (5 volts @ 3 amps) it initially declared but also three other power profiles: 27 watts (9 volts @ 3 amps), 45 watts (15 volts @ 3 amps) and 60 watts (20 volts @ 3 amps).

With these additional power profiles, the Razer Blade Stealth goes on to request higher power of 45 watts (20 volts @ 2.25 amps) which the charger then accepts.

From the power graph, we can confirm that the Razer Blade Stealth is drawing an average 34.5 watts (20.3 volts @ 1.7 amps) charging power with the battery being 36% charged.

Upon initial plugin and during power on, the Razer PC begins pulling current at 20 volts after requesting 45 watts (20 volts @ 2.25 amps) from the Plugable dock. After 10 seconds, the current pulled appears to fluctuate in between 1.5-2 amps range @ 20 volts. After 60 seconds, the PC draws mostly around 30.4 watts (20.3 volts @ 1.5 amps) with frequent current spikes.  

The Plugable Thunderbolt 3 Docking Station with Power Delivery is able to supply high enough power to charge the Razer Blade Stealth  which should be similar to the PC's own 45 watts USB Power Delivery based charger.