Just got iphone 5c a month ago, battery draining fast?

So this is my first iphone and I really like it, but the last couple of days the battery is just draining ridiculously fast. I've read a ton of stuff online about it. At first it seemed fine, but for example yesterday I charged it to 100%, barely used it all day and it was down to about 60% after about 7 hours of essentially sitting in my pocket.

So I went online to find tips and turned basically a ton of stuff off, deleted facebook (just to see), turned brightness down, and then used it to about 3% and then charged it again to 100% before I went to sleep. Left it on my desk all night for about 6-7 hours and generally it only goes down a few percent or so but today it was down 22%! From just sitting there with the screen off. The only thing I keep on is Wi-Fi but I don't see how that could drain that much battery overnight. Any ideas or did I get a bad battery?

That's a lot of juice. Short of apps in the background, auto-updates, and auto-pushes like emails, it could be. Not sure what diagnostics Genius Bar would benchmark with but it's worth it to have the Applestore inspect and find out. Best luck.