A1332 is an iPhone 4
Judging by the model number A1332 on the picture, it is an iPhone 4 and not a 4S so it could have been down to a dodgy batch of batteries from the battery supplier.
http://www.everymac.com/ultimate-mac-lookup/?search_keywords=A1332
I wonder if the batteries are made by the same company that made the infamous exploding Dell laptop batteries? I think that at the time it was Sony?
Cheers,