Q1: What phone are you currently using (if you have more than one phone, please provide the make and model for each phone)?
A1: I actually have a number of devices that I use on a daily basis that charge via some sort of USB connection. Primarily, I use a Nexus 5X that is charged primarily via a USB Type-C connection. The OEM wall charger for the Nexus 5X is strictly a USB Type-C charger; therefore, I would imagine it is a Qualcomm QC charger by that fact alone...not completely sure...just assuming. When you charge a Nexus 5X via a USB Type-C to USB Type-C connection, the phone indicates it is "charging rapidly". I will say the charge is definitely faster than a standard charge. If you charge a Nexus 5X via anything that is not a QC charger like most USB Type-A chargers, it just indicates it is "charging" and definitely takes longer.
As for other devices I use, I also have a Nexus 7 (2012) that I use daily. Yes I know it is antiquated, but still functional for my purposes. Had to flash a customer Recovery and ROM, but the important part is that the Nexus 7 is notorious for taking forever to charge. The Nexus 7 charges via a Micro USB cable, which may be part of the issue, but I am curious if a USB Type-A to Micro USB via a QC charger would expedite the charging process. I also use an iPad 2, which charges via a Lightning cable. Finally, I have a slew of various other USB devices I charge, such as various Bluetooth headphones or external speakers and external batteries. They all charge via a Micro USB charging cable.
Q2: What car(s) do you currently own or operate (please provide the make, model and age of the car)?
A2: I drive a 2008 Ford F-150
Q3: Do you currently own any QC chargers? If yes, what is the QC version (1.0, 2.0, 3.0)? What is the brand, model of the QC charger?
A3: I have the standard wall charger that comes with the Nexus 5X along with a slew of others that come with the various devices I have. I have also gathered up several off-brand chargers, but only one that I recall actually claims to be a fast charge charger. I was offered the opportunity to test out the LTNLab Quick Charge wall charger. The charger did seem to charge my devices a little more quickly, but I was not super impressed. I have noticed specifically with my Nexus 5X, if I use anything besides a USB Type-C to USB Type-C cable and charger, it is definitely a slower charge.
I also have another vehicle charger that I used pretty steadily for about 4 months by Pleson. It is a 3-port USB car charger that comes with two USB Type-A ports and single USB Type-C port. The USB Type-C port definitley charges my phone quickly to the point of my phone indicating "rapidly charging". I have actually noticed also if I use a ZUS USB Type-A to USB Type-C cable, I sometimes get a "rapidly charging" indication, but I am not sure if it is actually rapidly charging since it still takes a while.
Finally, I have the ZUS QC that I used for about 3 months and absolutley love it, but wish it had an integrated USB Type-C port. I also paired up the ZUS QC with the ZUS cable and was fairly impressed with the charging speed of the combination.