Thank you iFixit

My Problem

My battery didn't kept charged and after a week it was totally dead.

My Fix

I looked at the guide, some pictures of it aren't clear really, but I got it through the help of responses. After 10 minutes got it fixed, I'm so happy.

My Advice

Screws are really small, so watch out not to lose them.

After exchange the battery - I had trouble with iMessage, but I figure it out.

So I'm very happy with the result. Thank you iFixit !