The OEM Meizu has already confirmed that its upcoming premium smartphone 17-series will come with 30-watt (W) "mCharge" standard. Now, it has hinted at the prospect of a powerbank with the same technology. This would be handy in the absence of the gallium nitride (GaN) charger the phones are also rumored to ship with.
https://www.notebookcheck.net/Meizu-teases-a-30W-power-bank-to-go-with-its-impending-2020-flagship-phone.463789.0.html