I have a Samsung Galaxy S4 that I've had since 2014. It has worked perfectly but now it doesn't turn on. Let me give you guys a bit of a background on what I believe is the problem. So my charging cord that came with my phone stopped working so I bought a new one. Unfortunately that one did not last either. I then decided to buy 2 extra batteries so I can just have those charged and switch them in whenever my phone died. I did this very frequently, seeing as how I had a total of 3 batteries and I would use my phone all the time. Last Friday, my phone died and I didn't charge it until I went to sleep. (I had to use a charger that has to be at an angle to work). I woke up the next morning trying to turn on my phone but nothing happened so I switched it with a battery that I left charging overnight and I tried turning on the phone again. Once again nothing happened. I tried with my other battery and I got the same result. I don't know if it's the batteries that no longer work but from one of the batteries, I got a result. The phone vibrates and it shows a battery with the lightning symbol on it, saying that it needs to be charged. Then it starts charging but stays at 0% then stops charging completely. This has only happened a few times. Yesterday I was able to get it working and charging until it got to 17% (miraculously & it turned on). It was overheating so I put it on top of a fan so it can somewhat cool down. It then stopped charging after a while. I unplugged it and let it cool down completely then I went to go buy a new battery from batteries plus. I charged this new battery completely (last night) before I attempted to turn on my phone and it STILL doesn't turn on. I know it's not my charger either because it was brand new that I bought a few days ago and it works because it was charging my sister's phone.