Illegal and potentially dangerous 'energy-saving' plugs are still available on major online marketplaces, failing safety tests and subject to government recalls.
Despite claiming to save money on electricity bills, researchers found no evidence of effectiveness in eight tested devices.
The platforms removed reported listings after being contacted by Which?, but identical devices remained available weeks later.
Previous warnings by Which? resulted in the delisting of similar devices in 2022, with official recalls due to fire and shock risks.
Many devices made dubious energy-saving claims, leading to poor customer reviews, yet some continued to be sold.
Products exhibited poor quality soldering, excessive lead, and non-standard capacitors, potentially unsafe for consumers.
Consumers are exposed to scam adverts on social media platforms, using familiar faces like Elon Musk for authenticity.
Which? calls for legal responsibilities for online marketplaces to prevent dangerous product circulation.
Major online marketplaces like Amazon, eBay, SHEIN, AliExpress responded with safety assurances and removal of identified products.
The Product Regulation and Metrology Bill is urged to be strengthened for strict enforcement against harmful products.