I posting this in hoping that it will help somebody else. Last week I updated my iphone 6 plus to ios 8.1.1. I have also updated several apps since then. Since last week my battery life has been absolutely terrible. I was thinking it was 8.1.1. I noticed that my battery usage & standby usage where exactly that same. This should not be the case as my phone was off most of the time. My "home & lockscreen" usage was extremely high which was very strange. I then focused on the possibility of an app that recently updated and maybe has a rogue process running. I then turned off "Background Apps Refresh". Once that was off and I did a full charge my "usage & standby" times were once again different. Until I figure out which app is sucking the juice I'm keeping Background Apps Refresh completely off.