Credit: Rita El Khoury / Android AuthorityOver the past month or so, I’ve been stuck in power bank land, testing several different designs, capacities, and form factors. Most of these have been Qi2 and Qi2.2 power banks, with magnets that align perfectly well with my Pixel 10 Pro and Pixel 10 Pro XL, and a supposedly fast — on paper at least — charging speed.I’ve carried these in backpacks through busy days, in my pockets while traveling, and in my rental car while driving around. After all was said and done, I learned a few lessons from my experience, like the fact that the advertised battery capacity of a power bank is almost double what you really get when you charge your phone, and that the Pixel 10 Pro and Pro XL don’t like older Qi chargers. They also still charge really, really slowly over Qi2 and Qi2.2.