I had the same problem right after I upgraded my 5. I turned off all the obvious things like parallax effect, push email, location services, etc. but still had noticeably worse battery life than ios6. I would see 10% drops in battery life after only 30 minutes of use.
So I finally drained my battery completely - until phone dies and won't turn on, then recharged fully and that fixed the issue for me. I'm now at 2 days and 1 hour of standby with 2 1/2 hour usage and still at 51%. This is with wifi and bluetooth on as well.