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The USB Type-A based power charger accessory that comes with the Huawei Honor Magic uses Huawei's proprietary Magic Power technology to keep the phone charged. Huawei Magic Power technology can deliver up to 10 watts (5 volts @ 2 amps) charging to phones which don't support Magic Power. We test this out using the USB Power Delivery based Google Pixel to charge from a fully depleted battery with the Huawei Magic charger.

After connecting the Google Pixel with the Huawei Magic charger using the USB Type-A to Type-C cable accessory that came with the charger, we observe the charging behavior over the Granite River Labs GRL-USB-PD-A1 test software. Note no USB Power Delivery contract was  established given that the USB Type-A connector generally doesn't support USB Power Delivery.

When initially plugged in from zero charge, the Google Pixel first draws around 0.47 amps at 4.9 volts while the phone is off or in sleep mode. After few seconds, the current pulled drops quickly to zero but after a hard reset goes back up to 0.47 amps. Later the phone trickle charges for a while and then continues to draw around 2.3 watts (4.9 volts @ 0.47 amps) with the Huawei Magic charger. 

While the Google Pixel is able to charge with the Huawei charger, 2.3 watts is much too low power to enable any fast charging. By comparison, the phone can charge much faster using USB Power Delivery over USB Type-C with Google's own Google 18W USB-C Power Adapter (see review here). Still, the Huawei Magic charger may come handy at times when the phone is missing the Google charger and desperately needs a charge.