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The Stone is a USB Type-C dock made by Henge Docks that can be used to supplement charging as well as wired connectivity including USB, Gigabit Ethernet and DisplayPort for recent Apple Mac notebooks. While the Stone can use USB Power Delivery technology over its side USB Type-C port to charge upstream Mac's, the USB Type-C port at the back of the Stone does not support USB Power Delivery which can provide up to 10.5 watts (5 volts @ 2.1 amps) to charge downstream devices like a phone. Now let's find out how well this non USB Power Delivery capable USB Type-C port is able to charge the USB Power Delivery based Apple iPhone X when connected using a Apple USB-C to Lightning Cable.

As we observe the power graph on the Granite River Labs GRL-USB-PD-A1 analyzer software, starting from 0% battery level on the iPhone X at plugin, it takes almost 10 seconds for the iPhone to start pulling current to about 1.1 amps at initial voltage of around 5.1 volts during power off. After a short power lapse, the iPhone trickle charges for a while which it then goes on to draw around 10.5 watts (5 volts @ 2.1 amps) to successfully charge with the Stone.

At 10.5 watts, the iPhone X is also able to charge much faster than its own included 5W Apple charger which uses Apple's proprietary D+/D- based mechanism to provide 5 watts (5 volts @ 1 amps) over a USB Type-A connector.