Why is my 3.0 charger not doing the ultra fast charge?

[AC Question]

My V20 with Verizon came with a 2.0 charger in the box. I upgraded to a 3.0 charger and 3.0 usb-c cable to get the 3.0 charging speeds. But.... It's not charging any faster then the 2.0 charger. Why?? This phone has the 3.0 capability. Please assist...

 

[Ry]

My V20 with Verizon came with a 2.0 charger in the box. I upgraded to a 3.0 charger and 3.0 usb-c cable to get the 3.0 charging speeds. But.... It's not charging any faster then the 2.0 charger. Why?? This phone has the 3.0 capability. Please assist...

How are you measuring charging speed?

And are you measuring to 100%?