I have a galaxy s4, the battery dies after only about 4 hours, why?

[AC Question]

I have an Android S4, the battery looses its charge immediately, and shuts the phone off even though it says is has about 40% charge left. Why is this happening?

 

[Javier P]

Welcome to the forums. It's possible that the battery is starting to fail. Have you already tried replacing it for a new one?