Join the club buddy, I left mine on the charger 1 night for about 5hours and roll over out of bed picked it up only to burn my hand, after I drop my S4 because it was so hot, I find that half the screen was burned but still viewable, SIM card melted in the slot and the plastic slightly bent. Took it to a at&t repair center and they swapped it out on the spot. No question asked.
*AT&T SAMSUNG GALAXY S4*
*T-MOBILE SAMSUNG GALAXY S3*
T-MOBILE MDA-G4 >>> HTC P4350>>>ATT TILT>>>TYTN 2>>>ATT FUZE>>>ATT TILT II>>>HTC PURE>>> ATT NEXUS ONE>>> DELL STREAK >>>ATT SAMSUNG FOCUS>>>ATT MOTOROLA ATRIX 4G>>>ATT SAMSUNG FOCUS S>>>ASUS TRANSFORMER TABLET>>>ATT SAMSUNG GALAXY NOTE N717>>>MICROSOFT SURFACE RT>>>