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The AUKEY CC-T7 Car Charger has 2 USB Type-A ports- the orange colored one supports Qualcomm Quick Charge 3.0 port while the green one supports AUKEY's own AiPower charging technology.  The orange Qualcomm Quick Charge 3.0 port have the following power profiles: 6-6.5 volts @ 3 amps, 6.5-9 volts @ 2 amps, 9-12 volts @ 1.5 amps.  The green AiPower port provides 5 volts @ 2.4 amps.

The Le Max 2 supports Qualcomm Quick Charge 3.0 over USB Type-C. Let's see how well it works with the orange Qualcomm Quick Charge 3.0 charger port like the AUKEY CC-T7 Car Charger and how that compares with using the green AiPower port.

While charging the phone with its battery at 0% charge, we can observe from the oscilloscope screenshot that the voltage is 8.3V and has maximum current of 2.5A. 

With the battery at 25% charge, we can observe from the oscilloscope screenshot that voltage is 8.6V and maximum current has decreased to 2.5A

When the battery is at 50% charge, we can see in oscilloscope screenshot that voltage is 8.8V and maximum current is 0.9A

Here is the oscilloscope screen shot with the battery at 75% charge which shows the voltage as 8.8V and maximum current as 0.86A.

The screenshot below shows the voltage and current when the battery is fully charged. voltage 7.18V and current is 0.85A.

This is another screenshot that shows the D+/D- signaling sequences used to determine what voltage/current to be delivered.

The following graph shows how the Le Max 2 draws different current levels at roughly 9 volts as the battery charges from zero to full.  You can see a lot of current is drawn early on but that drops significantly after the battery is charged at 50%.

The Le Max 2 takes around 1 hour 25 minutes to charge completely while the phone is powered on with the AUKEY CC-T7 Car Charger's Qualcomm Quick charge port. 

  

Now, using the green AiPower port, let's see how the charging behavior changes with the Le Max 2.

The following graph shows how the Le Max 2 draws different current levels as the battery charges from zero to full.

With less power provided, the Le Max 2 takes around 2 hours to charge completely while the phone is charged with the AiPower adaptive charging port compared to the 1.5 hours observed when charging using the orange Qualcomm Quick Charge port.

  

As expected the orange Qualcomm Quick Charge port charges the Le Max 2 much faster when compared to using the green AiPower port of the AUKEY CC-T7 Car Charger.  Of course, if the Qualcomm Quick Charge port is being used to charge another Qualcomm Quick Charge compatible phone, you can still use the other port to charge your Le Max 2.