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24th January 2016
09:58pm GMT

This equates to less than 18p to charge your phone over a whole year according to Forbes. You read that right - 18 pence.
Your laptop may cost slightly more by using 72 kWh, which means it would incur a charge of around £5.60 to charge your laptop for 12 months.
Of course this is all assuming that you only need to charge your phone once a day and don't leave it charging after the battery is full. Which none of us ever do...