iPhone 5 won't start, just shows battery with bars when charging

[batteryi]

My iPhone 5 refused to start, so I charged it overnight and it was still showing the battery with a few red bars this morning. Resigned to the fact that I would lose unsaved data anyway, I tried to restore it through itunes. It downloaded a software update, even got to the apple logo and the bar filled up all the way!

And then it went back to the battery with red bars screen again :/

I've tried pretty much everything I've seen in forums. What can I do to revive it? Is the battery gone?

 

[hang-the-9]

May not just be the battery, could be a hardware problem with the phone. Nothing more you can do without having it looked at by a tech.