GTrusted

Plugging in the AC charger accessory of the Anker PowerCore+ 26800mAh PD with 27W PD Portable Charger Bundle to the Meizu Pro 7 Plus phone, we will see how well the phone charges using USB Power Delivery over its USB Type-C connector.

The USB Power Delivery negotiation on the Granite River Labs GRL-USB-PD-A1 test software starts to constantly display 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps), and 45 watts (15 volts @ 3 amps) source capabilities by the Anker 27W PD Portable Charger. However do be careful with the non rated 45 watts offered by Anker as the AC adapter may eventually overheat during charging, which could be potentially dangerous.

At 1% battery charge, the Meizu Pro 7 Plus is then seen to request 13.5 watts (9 volts @ 1.5 amps) from the Anker charger which it accepts. Anker then keeps on repeating the same response resulting in soft resets to occur.

We continue to observe both the charger and phone cycling through the same initial power protocol transactions over multiple hard and soft resets during the USB Power Delivery negotiation.

While being charged from 1% battery and switched on, the Meizu Pro 7 Plus initially pulls current to about 1.18 amps at 5 volts after first requesting 13.5 watts from the Anker charger. The phone then trickle charges through the repeated power cycles and soft and hard resets. After 30 seconds, the voltage only starts to increase to 9 volts while the current pulled is around 0.5 amps.

We only manage to observe the Meizu Pro 7 Plus draw power at most 5.9 watts (5 volts @ 1.18 amps) during initial charging with the AC charger portion of the Anker PowerCore+ 26800mAh PD with 27W PD Portable Charger Bundle. By comparison, the phone is able to get a more stable and over 23W of fast charging using its own USB Type-A based AC charger from this review.

It's important to be alert if you plan to use the Anker charger with any notebook PC that tries to draw more than 30 watts. Given that Anker actually promotes 45 watts rather than the rated 30 watts in the above power delivery protocol negotiations, this could likely pose a danger with the AC adapter eventually overheats when supplying 45 watts.