vampire device

(名詞/可數) 吸血鬼裝置 - 沒在使用但開關打開時仍在耗電的電器。

As millions of people continue to spend more time than ever before at home … households could save 16 per cent on their electricity bills each year just by switching off their vampire devices. Vampire devices are electronics that continue to drain power when left on standby and with the average annual electricity bill currently at £474.44, Brits could save an average of £75 per household per year … just by flicking a switch.
[, 18 March 2022]