If an unused phone charger left plugged in apparently costs me money as its using my electricity, how does this not apply to a socket outlet that has a built in USB.
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An unused phone charger uses between 0.1 and 0.5 Watts when plugged in and idling – usually the larger number when it’s got an indicator light.
This means that every hour it’s plugged in, you use 0.0005 kWh worth of energy, which you pay for.
Over a year (365 days, 24 hours) that’s about 1-4 kWh, which costs about 10-45c USD based on the national average price.
In my country, that’s up to R10 per year, not even enough to buy a can of coca cola.
Wall sockets with integrated usb ports use about the same.
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