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How the Ravi 26800mAh Portable Charger with Type C Port Charges the Apple MacBook Pro 15-Inch (Late 2016) using USB Power Delivery

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After seeing how the USB Power Delivery based portable battery of the RAVPower Xtreme 26800mAh Portable Charger with Type C Port + 30W Type-C AC Charger charges the Google Pixel phone, let's see if it can also charge the Apple 15" MacBook Pro (Late 2016) using USB Power Delivery.

The RAVPower Xtreme 26800mAh Portable Charger with Type C Port + 30W Type-C AC Charger battery initiates the USB Power Delivery negotiation by declaring that it offers only a single 15 watts (5 volts @ 3 amps) power profile to the Mac.

The charger battery then accepts the Mac's request to pull 15 watts (5 volts @ 3 amps).

The charger battery later advertises not only the 15 watts (5 volts @ 3 amps) it initially declared but also four other power profiles: 27 watts (9 volts @ 3 amps), 28.8 watts (12 volts @ 2.4 amps), 31.5 watts (15 volts @ 2.1 amps), and 30 watts (20 volts @ 1.5 amps).

This leads the Apple 15" MacBook Pro (Late 2016) to request 31.5 watts (15 volts @ 2.1 amps) from the battery which it accepts.

The charger battery further requests to obtain Sink Capabilities from the Apple 15" MacBook Pro (Late 2016) which the Mac complies.

This is then followed by data role swaps by the Mac.

When the Apple 15" MacBook Pro (Late 2016) is being charged on a fully drained battery, we can see that charging eventually settles at about 15 volts @ 2 amps. 

We can confirm that the RAVPower Xtreme 26800mAh Portable Charger with Type C Port + 30W Type-C AC Charger's portable battery does charge the Apple 15" MacBook Pro (Late 2016) using USB Power Delivery when the battery is completely drained on the Mac.

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