Hi! My S4 was at 1% but I just got an important text so I unlocked it and it froze. The screen went black so I figured it went off. I plugged in the charger and nothing happened, after a while the empty battery icon came on, then went off and it kept doing this. I'm not exactly sure what to do, no combination of button pressing for 30 seconds or battery removing seems to help. Any ideas? Thank you so much!