A consumer investigation reports that counterfeit USB phone chargers, some allegedly filled with modelling clay, are being sold through major retailers. The UK consumer organisation Which? reportedly bought 15 USB phone chargers to test their safety and construction. According to the findings cited by outlets, nine of the chargers were so poorly made that using them could pose a risk of electric shock. The reported concern centers on manufacturing quality and internal contents, with some products described as containing modelling clay rather than appropriate electrical components. The articles do not indicate which specific brands or retailers are involved, nor do they provide details on the full scope of the testing beyond the sample size and the number failing safety standards. The reporting presents the investigation as evidence of a safety problem linked to counterfeit or substandard chargers entering retail channels. The outlets also suggest consumers could face harm if they use the affected chargers and highlight the importance of verifying product safety and authenticity.