Ever since the update to Android 4.4.2 the battery life on my HTC One has gone right down the tubes.  Once the update completed, I do a clean reinstall - deleting everything, and let the update reinstall.  Battery life when I go to bed is in the 80% - when I get up I'm getting a warning that it's hitting 14% and needs to be charged.  There are no phone calls, no text messages, nothing.  So I reinstalled again - again deleting everything - and didn't reinstall any apps.  I even turned off Blinkfeed and "disabled" a bunch of stuff that was automatically loaded.  Battery life still sucks - I wake up in the morning to the warning that the battery has hit 14% and needs to be cabled.

What is going on?  Battery life before the update was okay - now it absolutely sucks.  Anyone else having this problem?