The Precision 3520 would often report between 80 to 90 watts power being less than the 130 watts the laptop is designed to receive. I have the slow charging high capacity versus the smaller fast charging battery.
I used the HooToo for the better part of a year and over that time, I found that the dock would require several plug-ins to the laptop before successfully bringing the charge feature online. Once in a while the USB-C network adapter on the dock would fail to show up. In every case, the HDMI port showed up. I equipped myself with some cablematters USB-C extension cables and instead of "cycling" the laptop plug port directly, I "cycled" the junction formed between the cablematters plug and the USB-C plug coming out of the dock. The idea was to reduce wear on the laptop. Although this worked, it was inconvenient.
A few months ago I saw an Elrigs USB-C dock on "not quite" 50% off sale. Too good a deal to pass up, I ordered one. This Elrigs delivers the Precision a meager 60 to 65W power, but it adequately provides power to my mouse, keyboard, and the limited power is sufficient charge the battery over the course of a couple hours. However, I find the Elrigs USB-C networking device (which uses the r8152 module of the Linux kernel) does not always re-register when I awaken the laptop from suspend. For what it's worth, my Philips 499P9 display has a built-in dock with the same kind of network chipset (r8152) and it does, too. Inspection with ifconfig shows that the kernel does not have the 'eth' device registered.
The lease disruptive fix I have found is to sudo rmmod r8152; sudo modprobe r8152. Once I invoked those two commands, NetworkManager immediately brought the interface up.
