Battery power bank adapter as a charger on the go

I recently read the article about the batteries for dji air 2s and it stated this “You can also charge the Mavic Air 2’s battery using the power bank adapter that’s also included in the Fly More combo.”

Is it true? has anyone managed to charge the drones battery with this way?

Article url : DJI Mavic Air 2 Battery (Everything You Need to Know) – Droneblog