Battery Issues Likely Cause of iPhone 3GS Overheating | WIRED
iPhone 3GS / 4 / 4S Battery Life Testing - Putting the Conjecture to Rest - PC Perspective
I was planning to use my old iPhone 3GS for weekend project but I discovered that the screen was popped out and the back was bulging, I took it apart and this
Concerns of iPhone 3GS Overheating and Discoloration Gaining Publicity - MacRumors