I thought it was odd that after getting battery level updates for approx every 15% reduction, the last battery update had Huawei at 29%, iPhone 25% and Samsung 26% then no more updates. Why not show when they are at around 10 to 15%?Looks like the mate 20 pro couldn't beat the iPhone with a 7nm chip. While the test technically isn't fair as the iPhone doesn't have a 2k screen, the mate 20 does have the much bigger battery. Pretty disappointing results.
Also, what does "optimum" brightness mean? In a controlled test, all phones should be calibrated to identical levels.
Edit: Also Huawei should be set to NORMAL and not VIVID in the display settings. I found this had a significant affect on battery life as well as looking better on the P20 Pro.