Another cause of apple gear blowing up is people charging their ipads on the iphone chargers as displayed above and not using the supplied surge protected charger that comes with the ipad.
People use their standard phone chargers to charge the ipad and have been having them explode.
My old iphone 3g S however has been sat idle for 18 months now, it has gradually swelled and swelled to the point it has burst apart, popped the screen off and forced out the main button. I will be writing to apple explaining it was my current phone that i had not used for 2 weeks after going away on holiday only to return to find it in that state, please provide a replacement free of charge.
I planned on selling that phone for the £100 or so it was worth, so i fully plan on getting something back for it seeing as it decided to spontaneously explode itself.