IPhone 5 not powering on

I have a iPhone 5 that has been sitting for a couple years. I have been charging it for 2 days straight now and it won't turn on. It is not jail broken. I have tried the wire on my iPhone 6 and it works so I know the iPhone 5 is getting power to it. Any idea on how I can turn it on or what I can do?

via iLounge Forums http://ift.tt/2dz0eON