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The Targus 45W USB Type-C Laptop AC Wall Charger (click here for Amazon pricing) can be used to charge other USB Type-C devices even if they don't support USB Power Delivery like the Huawei P9 phone.

When connecting the Targus 45W USB Type-C Laptop AC Wall Charger to the Huawei P9, we can see that the Huawei P9 just simply pulls 10 watts (5 volts @ 2 amps) with the phone's battery being fully drained.

Even though no USB Power Delivery contract is established, the Targus 45W USB Type-C Laptop AC Wall Charger can still charge USB Type-C phones like the Huawei P9, and starts charging at the maximum 10 watts power that the phone can draw.