Suffering from poor battery life? We can replace the battery in your Samsung Galaxy S4 for as little as $49! You might be surprised to know that other problems that seem completely unrelated are actually cause by battery issues in mobile devices. Such as the handset randomly rebooting or overheating issues. In more serious cases the battery actually swells and you can see that the case is swollen. This is a well documented issue for the Samsung Galaxy S4.
So don't put it off, over time these problems eventually degrade the fragile components in the phone either by increased pressure, heat or underpowering components. None of which is good for the longevity of the handset. Get it fixed now before you're up for much more then just a battery replacement.