Thanks to the 5A, I can charge my Macbook pro with it without any problems when it is closed. When it's on, it doesn't charge, the battery just stays the same.

Hello
I do not know. I charge tablet and smartphone. Greetings

I've had this powerbank for a few weeks now. It doesn't work with my X390 Yoga, so I don't think it will work with the T480.
It's only 25 watts that come out.