What happens if you use the Apple 29W USB-C Power Adapter to charge the LeEco's Le Max 2?
Using software from Granite River Labs, we can see that the Apple 29W USB-C Power Adapter offers 12 watts (5 volts @ 2.4 amps) and 29.6 watts (14.8 volts @ 2 amps) to the Le Max 2.
The Le Max 2 first requests 5 volts @ 1.5 amps from the Apple 29W USB-C Power Adapter.
After the Apple 29W USB-C Power Adapter provides 7.5 watts of power to the Le Max 2, the Le Max 2 then requests 5 volts @ 2.4 amps (12 watts) allowing it to charge much faster.
We could verify that the actual current pulled by the Le Max 2 from the Apple 29W USB-C Power Adapter is about 2.4 amps.
The Le Max 2 takes around 2 hours to completely charge using the Apple 29W USB-C Power Adapter while the phone is left on.