https://www.theguardian.com/money/2022/apr/29/tech-expert-energy-vampire-devices

Unplugging equipment normally left on standby may not save consumers as much cash as hoped

As the cost-of-living crisis bites, and households look for any opportunity to cut the bills, headlines suggesting consumers can save hundreds of pounds just by turning off unused chargers have been an appealing prospect. But, experts say, such claims about “vampire devices” are actually more like a zombie statistic.