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How USB Power Delivery Charging Goes Between the Google Pixel 2 XL Phone and the Anker PowerCore 13400mAh Nintendo Switch Edition PD Portable Charger

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While the Anker PowerCore 13400mAh Nintendo Switch Edition PD Portable Charger basically serves to supplement charging for the Nintendo Switch, it is also compatible with other devices such as the Google Pixel 2 XL phone. Let's find out how the Google phone charges with the third party 22.5W based Anker power bank through USB Power Delivery 2.0 technology.   

The Google Pixel 2 XL's battery was fully discharged when the phone was first plugged in to the Type-C connector of the Anker PowerCore 13400mAh Nintendo Switch Edition PD Portable Charger. As the voltage started off on a 5 volts rail, the phone was observed to pull quick current to draw initial power of up to 7.8 watts (5.2 volts @ 1.5 amps) from the power bank. After the battery has charged for almost 20 seconds, the current quickly dropped down to near zero. A hard reset caused the phone to pull current again while the voltage rose up to a 9 volts rail for charging to resume at about 4.5 watts (9.1 volts @ .5 amps). The phone later pulled much higher current to finally charge at about 17.1 watts (9 volts @ 1.9 amps) which is close to 18 watts the phone can draw from its own original Google 18W charger. After some time when charging reached 18 watts (9 volts @ 2 amps), the current dropped back down to .5 amps but picked up again after a while for charging to happen at about 13.5 watts (9 volts @ 1.5 amps). Click here to download the trace captured by the GRL-A1 power analyzer to view more details.

Despite the inconsistent charging, the Anker PowerCore 13400mAh Nintendo Switch Edition PD Portable Charger still managed to deliver power good enough to charge the Google Pixel 2 XL up to speed.  

Download the A1 software from Granite River Labs to view the trace.

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