I also noticed the battery is horrible on its last 30% or less. I actually tested the last few nights if it would make it through the night when it's at about 30. The first night it actually shut off, last night it was at 1%. This is after closing all programs, battery saving is on, screen brightness all the way down, blocking mode is on. The first time it showed that quick connect sucked the life out of it which is weird because I don't even use that feature. The latest test showed that the Android OS drained it, but again, I had no programs open and running.
-via Android Central App on GWaLL's S5