Besides Motorola's proprietary TurboPower charging scheme, the Motorola Moto G6 also supports USB Power Delivery 2.0 technology for rapid USB Type-C charging. To see how well the Moto phone performs over USB Power Delivery, we used the Google 18W USB-C Power Adapter that shipped with the Google Pixel 3 XL phone to fill up the Motorola Moto G6's battery. We could see overall charging took about 115 minutes to complete from a fully discharged battery on the Moto phone.
A few seconds after plugin the voltage began on a 5 volts rail while current was initially pulled allowing up to 5.5 watts (5 volts @ 1.1 amps) of charging. The current then dropped slightly to about 0.8 amps and subsequently changing rapidly, causing it to repeatedly go down to zero. A hard reset later the phone pulled much higher current to achieve max charging at around 14.5 watts (4.7 volts @ 3.1 amps). After the battery has charged for about 2 minutes, the current slowly reduced to about 2.7 amps but began bouncing up and down when approaching 7 minutes of charging. Over the quick changing current the phone repeatedly drew 2.4-2.5 amps @ 4.8 volts to charge at around 12 watts. The current eventually settled out after 34 minutes and began to gradually ramp down to almost .2 amps as the battery almost filled up. In the last few minutes of charging some residual current up to .5 amps was randomly pulled. Click here to download the trace captured by the GRL-A1 power analyzer to see more details on the entire power charging cycle.
The Google 18W USB-C Power Adapter uses a rapid current modulation approach to achieve 12-14W charging with the Moto G6 which is quite similar to how the phone charged with the Motorola TurboPower based charger. The Moto G6 was also able to charge slightly faster with TurboPower compared to using USB Power Delivery.