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To see how the BatPower PD6's AC Adapter can be used to charge the HTC 10 using USB Power Delivery, we link up the phone with the AC Power Adapter and observe their USB Power Delivery negotiations.

Note that the BatPower PD6's AC Adapter needs to connect to the BatPower round to rectangle connector adapter to the BatPower USB Type-C Adapter before connecting to the HTC 10 using a USB Type-C to Type-C cable. We can see that the BatPower PD6's AC Adapter communicates with the HTC 10 over USB Power Delivery by repeatedly displaying 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) power profiles. Note that while the charger's casing claims to support 90W  output, we see here the charger only offers a max of 60W.

The HTC 10 requests to pull 15 watts (5 volts @ 3 amps) after a while which is accepted by the BatPower charger.

While the HTC 10 is being charged on a 11% full battery, the phone starts off pulling around 15 watts (5 volts @ 3 amps) before eventually charging  at about 12.5 watts (5 volts @ 2.5 amps) which shows that it can perform well with the BatPower PD6's AC Adapter over USB Power Delivery.