Advice needed: What’s the best external battery to charge iphone, laptop and camera?

Next week I am visiting my parent in the Pyrenees. As usual I will do a lot of hiking but I got one major issue. The battery of my three-year old laptop and iPhone are really terrible. Can’t work more than 45min with iPhone as hotspot and my laptop with full brightness setting during daylight. I therefore need an external battery. There are so many batteries on Amazon and I can’t decide which one suites me best.

At the moment I am inclined to buy the Mophie Powerstation XXL. Only downside is the relatively slow charging speed of 30 Watt. If you have any suggestion for a more powerful but still reliable battery drop it as a comment. Thanks!