SCEA have sent out an alert to their customers about the existance of fake Dualshock 3 on the market, they explain that these fakes are literally identical so be aware when buying some new controllers out there, they already working on a FW Update to detect and stop these counterfeits exploding controllers.
Counterfeit PlayStation®3 Wireless Controllers, which are practically identical in appearance to genuine PlayStation®3 Wireless Controllers, have been discovered in the market. SCEA advises consumers to be cautious when buying PlayStation®3 Wireless Controllers from uncertain sources as the quality, reliability and safety of counterfeit products is uncertain, and in some cases, may be dangerous. It is possible that some counterfeit product may ignite or explode, resulting in injury or damage to the user, your PlayStation®3 computer entertainment system, or other property. Moreover, SCEA does not support continued functionality of counterfeit or unlicensed controllers in system software updates and these devices may cease to function in the future because of system software updates.