GTrusted

The LG G6 phone supports USB Power Delivery for fast charging so let's see how well it works with the USB Power Delivery based BatPower PD6 Power Bank. The LG G6 battery is completely drained when we start charging it with the BatPower PD6 over the USB Type-C interface. Note you will need to attach the BatPower USB Type-C Adapter to set up USB Type-C connection in between the phone and power bank. 

From the USB Power Delivery negotiations, we can see that the BatPower PD6 repeatedly declares its source capabilities of 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps), 36 watts (12 volts @ 3 amps), 45 watts (15 volts @ 3 amps) and 60 watts (20 volts @ 3 amps). It appears the BatPower PD6 has incorrectly specified 90W on its cover since it only displays max 60W power profile.

The LG G6 then requests to pull 27 watts (9 volts @ 3 amps) from the BatPower PD6 which it accepts.

Looking at the power graph, we can see that during the first 10 seconds, the LG G6 begins pulling around 8 watts (5 volts @ 1.6 amps) from 0% battery. As the voltage increases to 9 volts, the phone when turned on trickle charges for a while before eventually drawing only 0.5 amps at 9 volts. When reaching 30 seconds of charging, again we can see that the phone repeats its initial charging at almost similar power levels. After 50 seconds, the current appears to be bouncing in between 0.5 and 1 amps at 9.2 volts as charging continues. 

Since we didn't observe the LG G6 get stable charging or anywhere near the full 3 amps requested from the BatPower PD6 (see this review for how 15W is achieved with a Google USB PD charger), we can confirm that the power bank can't really charge the phone properly using USB Power Delivery.