My iPhone says it's charging but it isn't?

I plug my iPhone 5 into the cord and it has a lighting bolt next to the battery sign but I left it there for an hour and it's still on 13%. It's a new cable cord and it also says "this cable or accessory is not certified and may not work with this iPhone" but it's an iPhone charger. I'm pretty sure. What's wrong with it?

It's a great problem if your iphone does not work properly because of charging problem. I also face same problem like you. Then I visited a good website and took their help. I'm suggesting you to visit them and learn about their product. It is really helpful and trusted. All the best.

From personal experience change the wall plug in or try a different charger it worked for me. If that doesn't work get a new battery for your phone.