We tested nine portable monitors, including models from Asus, Dell, HP, Innocn, Lenovo, and LG. We used each monitor for at least a day of work in a café away from our regular office, which included typing up documents, working with spreadsheets, watching videos, and chatting on Slack. We also ran side-by-side tests where the same image was shown on two portable monitors for visual comparison, to ensure we picked the sharpest display with the best color.