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Smartphones barely consume energy

You only have to cast your mind back to when you used to charge your primitive mobile phone in the past (your battery could last up to 5 days) and how many times do you have to charge your smartphone now?

In fact now, rather than charging your phone, you have to have it plugged in permanently - more like a fixed phone than a mobile – given your fear of running out of battery in the middle of a facetime conversation or while trying to get somewhere using your GPS system.
This is not just a theory. According to a study carried out by the University of Stanford, the energy consumption of a mid-range smartphone is 5 to 30 kWh per year. Only a fifth of the energy consumed by a washing machine over the year.
The only way of getting the cost down is to occasionally let the battery run down completely, close all your apps when you are not using them and put the phone on standby whenever possible.

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