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Is it OK to leave device chargers plugged in all the time? An expert explains
(theconversation.com)
this post was submitted on 27 May 2025
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Technology
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The article is very light on details. There are better articles with some real numbers.
Chargers for a phone draw 0.1W roughly. That's 0.9 kWh per year, and with a price of €0.35/kWh would be €0.32 / year / charger you leave plugged in. That's not even a rounding error compared to what my heat pump uses.
Devices with an indicator light barely use anything more. The ones with a display or clock do use more power, usually a few watt, what then comes down to maybe €10 / device / year using napkin math.