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The HTC 10 supports Qualcomm Quick Charge 3.0 over USB Type-C and while we've seen various compatibility issues with USB Power Delivery chargers, let's see how well it works with other Qualcomm Quick Charge 3.0 chargers from LG G5 and Xiaomi Mi 5.

Note the oscilloscope screenshots below are taken while the HTC 10 battery is at about 5% full.

First, HTC 10 has the following voltage and current charging waveforms when charging with the LG G5's Qualcomm Quick Charge 3.0 based charger.  This charger claims supports 9 volts @ 1.8 amps and 5 volts @ 1.8 amps and we can see that the HTC 10 actually pulls 9 volts @ 1.5 amps from it.

Next, using the Xiaomi Mi 5 Qualcomm Quick Charge 3.0 Charger, we also see that there is different behavior where the voltage reaches about 5.1 volts while the current reaches almost 1 amps.  This charger claims 5 volts @ 2 amps, 9 volts @ 1.2 amps, and 12 volts @ 1 amps.

Interestingly with the HTC 10's Qualcomm Quick Charge 3.0 Charger, the voltage reaches 7.6 volts while the current hits 1.6 amps.  The HTC 10 charger claims support of 5 volts @ 2.5 amps, 9 volts @ 1.7 amps, and 12 volts @ 1.25 amps so the actual voltage of 7.7 volts seen is less than the 9 volts amps stated by the charger.  

All three Qualcomm 3.0 chargers show very different behavior with the HTC 10 and thus different charging times.