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HTC 10 Supports USB Power Delivery Charging from the Apple 15" MacBook Pro (Late 2016)

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Since the HTC 10 phone supports USB Power Delivery over its USB Type-C connector, you should be able to use certain notebook PC's like the Apple 15" MacBook Pro (Late 2016) as a power bank to keep the phone charged (assuming you don't mind sacrificing your notebook's battery charge if the AC power is not plugged).

Here we connect a USB Type-C to Type-C cable between the HTC 10 and the Apple 15" MacBook Pro (Late 2016) when the notebook is 28% charged but the HTC 10's battery is fully depleted. Under the phone's USB charging options, we select 'Charge this Phone' to start charging the phone with the MacBook.

Looking at the USB Power Delivery negotiations, the Apple 15" MacBook Pro (Late 2016) repeatedly declares a single power profile of 15 watts (5 volts @ 3 amps) to start communications with the HTC 10.

After some time we can also see that the MacBook constantly offers a different source capability of a single 7.5 watts (5 volts @ 1.5 amps) without any response from the HTC 10.

We then observe that the HTC 10 finally requests to pull 7.5 watts (5 volts @ 1.5 amps) from the MacBook which is accepted.

In between negotiations, the Apple 15" MacBook Pro (Late 2016) can also be seen to request power sink capabilities from the HTC 10 which it complies by displaying 4.5 watts (5 volts @ 0.9 amps). This is then followed by a data role swap between both the phone and MacBook.

While the Apple 15" MacBook Pro (Late 2016) on a 28% battery is charging the HTC 10 from 0% battery, we can see that the phone actually pulls around 7.5 watts (5 volts @ 1.5 amps) from the MacBook. The MacBook can be used to charge the HTC phone over USB Power Delivery but at a power lower than what the phone would get from its own Qualcomm Quick Charge 3.0 based charger. 

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