In conclusion, after running the autonomy tests and using the devices in real-world situations, the Huawei Mate 20 Pro is the one that offers by far the best autonomy (also has the largest battery) over a day from the point of view of a power user. In second place we have the Asus Zenfone 5Z, then Samsung Galaxy Note9 and then Sony Xperia XZ3 and iPhone Xs (which also has the smallest battery!).