How to fix your iphone not charging?

My 4S is not charging! I recently updated it to IOS 7 and now it says it is at 100% all the time but when you unplug it the phone shuts off. I think its IOS 7 because my Wi-Fi and flashlight do not work as well everyone thinks its the battery but I think its IOS if there's any input that could be useful I don't want to take it to a store unless absolutely necessary thanks…

The store will be the only place they can check the battery and tell you if that's the problem. Does it work well when plugged in? If it works fine when plugged in then it's not the OS as that would mess it up all the time.

Step one, set your iphone on fire.step two, buy a android