Samsung s4 gets hot

[Android Central Question]

I recently purchased an s4 of someone cheap and all seems to be working fine apart from the mobile gets hot (near the top of the screen so cant be the battery surely?)

And the battery goes down quite fast, what could be the problem, thanks

 

[B. Diddy]

Welcome to Android Central! The battery is probably old and failing. Get a new battery -- they're pretty cheap.