Reddit reviews USB C Charger AUKEY 72W 3-Port Fast Charger with 60W Power Delivery 3.0 Ultra Compact PD Adapter for MacBook Pro, Dell XPS, iPhone 11 Pro Max/SE, Galaxy S10, iPad Pro, AirPods Pro, Pixel 4XL, Switch

1. You are correct. the cable which comes with the new iPad pro is a USB 2.0 spec. Cannot support 4k external monitors and cannot charge at the fastest USB C can charge.
   
2. Your cables will not cause any problems but they will also not charge your iPad at the fastest speed it can. This cable charges my iPad super fast in conjunction with this charger. The cable is a USB C gen 2 cable which means it supports much faster charging and data transfer (the new iPad has a gen 2 port) and can output to 4k monitors. I also charge my Lenovo yoga 720 at full speed with no issues (Dell doesn't normally allow you to use any other USB C charger aside from the one the laptop came with). For a good 6ft USB C to USB A charger (at 3.0 speeds but not at USB C gen 2 speeds) I recommend this.
   
3. No you will have no issues using a slower speed cable. Except that you will charge slower and transfer data slower and cannot output to 4k monitors. I answered your question in answer #2.
   
4. Do not worry about the voltage. Unless you are out of America the voltage is not an issue because the device is able to detect it and monitor to make sure it's not taking too much voltage or getting too little. What you probably mean to ask is about the Wattage. USB C supports much higher wattage and generally the higher the wattage the faster it will charge (won't harm the device by charging faster since once again the iPad regulates to make sure it's not taking too much too fast). The charger that I linked above has a USB C power delivery port and will output 60 Watts to your iPad to charge it at its max speed. I do not believe that a USB C charger outputting at 80 Watts would charge your iPad even faster (but I could be mistaken).
   
5. Yes you can charge your iPad from your Dell docking station. It says straight on their website "USB Power Delivery USB Type-C cable supports up to 130W to power your laptop and peripherals." Up to 130W means it will charge your iPad at its max speed as long as you have a gen 2 USB C to USB C cable that supports it (like the one I linked above).
   
   Hope all of this helps and you enjoy your new iPad as much as I enjoy mine! :)

You want this one

AUKEY USB C Charger with 60W Power Delivery 3.0 & Dual Port USB Charger for MacBook/Pro, Dell XPS, iPhone XS/iPhone XS Max/iPhone XR, Samsung Galaxy S8 / S8+ / Note8 and More https://www.amazon.com/dp/B079P11LBV/ref=cm_sw_r_cp_apa_4dnPBb8CCHHSN

This is the one I use. I love it: AUKEY USB C Charger with 60W Power Delivery 3.0 & Dual Port USB Charger for MacBook/Pro, Dell XPS, iPhone XS/iPhone XS Max/iPhone XR, Samsung Galaxy S8 / S8+ / Note8 and More https://www.amazon.com/dp/B079P11LBV/ref=cm_sw_r_cp_tai_uM9TBbV1Z68M5

Yea, seems to be the case.

If I were to get a charger I'd likely grab the Aukey one.

This one looks good if ya need 60W. Another one to consider if you're okay w/ 46W and also want QC 3.0.

Thanks alot for this detailed info..I discovered a charger I got late last year has the capability as the other aukey chargers it's also an aukey charger.


https://www.amazon.com/AUKEY-Charger-Delivery-Compatible-MacBook/dp/B079P11LBV/ref=mp_s_a_1_3?keywords=AUKEY+USB+C+Charger+with+60W+Power+Delivery&qid=1568815275&sr=8-3

Or

https://www.amazon.com/dp/B079P11LBV/ref=cm_sw_r_cp_apa_i_SzJGDbE96N3D9p

Thanks.

Obinna

Not yet just curious what it supports before using it with this... AUKEY USB C Charger with 60W Power Delivery 3.0 & Dual Port USB Charger, Compatible MacBook/Pro, Dell XPS, iPhone Xs/XS Max/XR, Samsung Galaxy S8 / S8+ / Note8 and More https://www.amazon.com/dp/B079P11LBV/ref=cm_sw_r_cp_apa_i_HxzADbJ5SZTYJ