My battery life was great from 7 to 7.0.4, got worse under 7.0.6, then 7.1 fixed it for me and now it is even better than 7.0.4.
What apple device are you using that seemed to get better?
There have been several threads on the battery life on 7.1. Some have seen less battery life but for the most part, for others, the battery life was equal or better on 7.1
Battery life seems about the same to me.
That is why I made a new thread because most people just talked about better battery life-not worse