The Anker PowerCore 13400mAh Nintendo Switch Edition PD Portable Charger uses the same USB Type-C port for both in and out charging up to 22.5 watts through USB Power Delivery 2.0 technology. To see how the Anker power bank gets power supplied by a external ac power source, we connected to the Apple 29W USB-C Power Adapter which also supports USB Power Delivery charging. The power bank was observed to take more than 121 minutes to charge to full with the Apple charger, starting from a dead battery on the power bank.
At plugin current was immediately pulled by the Anker power bank as the voltage started off at around 14.5 volts to get charged initially at about 26 watts (14.5 volts @ 1.8 amps). The power bank went on to draw the same 26 watts of steady state power from the Apple charger as observed up to 121 minutes. Click here to download the trace captured by the GRL-A1 power analyzer to see more details on the entire charging cycle.
Even though we did not observe entire charging to complete, we can confirm that the Apple 29W adapter was able to charge the non Apple based Anker power bank relatively well despite needing more than 2 hours for a full charge.