Snapdragon 625 is very energy efficient CPU but I am also surprised how good snapdragon 835 is. I don't think there are snapdragon 625 with QHD screen but there are few 1080p with snapdragon 835 (OP5 and xiaomi 6) and better life is almost good as keyone.
Here is a OP5 usage recently.
https://uploads.tapatalk-cdn.com/201...293b8b8c71.jpg