15 Ultra

Mein Tipp aus vielen Reisen: Nimm eine die sich sehr schnell aufladen lässt. Mein Tipp: Anker 737 oder Cuktech 15 Ultra. Laden beide mit 140w Ladegerät in unter einer Stunde voll. So kannst du mittags im Cafe das kurz anstecken und hast wieder Strom für mehrere Tage. Das ist ein riesiger Unterschied

This one would work well, $70 should get you an extra 20000mAH on top this one has generally tested well. https://www.smartzone.de/cuktech-15-ultra-im-test-20-000-mah-powerbank-mit-165w-input/ (DE) https://www.notebookcheck.net/The-beast-among-the-20k-power-banks-Cuktech-15-Ultra-review.1300618.0.ht

I have the Cuktech 15 Ultra and I really like it. I think it is better than the 20, though it has a little less capacity. I also have the 737 and feature/performance wise I would prefer it over the Cuktech 20. 15 Ultra vs 737 is a hard decision.

Cuktech 15 Ultra. 72Wh 20000mah, 210W MAX output and 165W input to both c port at the same time. It's better to not have power banks that are over 20000mah, Some unprofessional security staffs look at "mah" instead of "wh" and sometimes reject banks with battery <100wh but >20000mah