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How the Apple 10.5-inch iPad Pro Charges with the Google Universal 22.5 W Dual Port USB Type-C Charger

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The Google Universal 22.5 W Dual Port USB Type-C Charger supports the USB Power Delivery specification but because it doesn't use a USB Power Delivery controller, no active USB Power Delivery protocol negotiation is established.

To see how the Google Universal 22.5 W Dual Port USB Type-C Charger supplies power to the Apple based 10.5-inch iPad Pro which also supports USB Power Delivery, we link them up using a Apple USB-C to Lightning Cable.

Looking at the power graph from the GRL-USB-PD-A1 app by Granite River Labs, the 10.5-inch iPad Pro draws around 13.5 watts (5.2 volts @ 2.6 amps) from the Google Universal 22.5 W Dual Port USB Type-C Charger while being charged from a 1% dead battery state. 13.5 watts is slightly higher than the Apple 12W USB Power Adapter.that is shipped with the iPad.    

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