Using Mophie Powerstation mini to power HomePod Mini

The HomePod mini comes with a detachable 20 Watt USB C Mains Plug.

Instead of the supplied plug, If I connected the 20 Watt Mophie Powerstation Mini you sell on the Apple Store, to the HomePod Mini’s USB C cable connector would this be safe and provide sufficient power, to operate HomePod mini as a portable device but within WiFi range ?

I got the idea from watching this video

https://youtu.be/9YJ7RipGeFI

This is the Link to the HomePod Mini:

HomePod mini - Apple (UK)

This is the Apple Store Link to the Mophie Powerstation Mini:

mophie powerstation mini - Blue - Apple (UK)

Dean