If we could charge ourselves by USB it would take around six days to run a human for a day
It would take around six days to give someone enough energy equivalent to one day’s worth of food.
Read more: http://www.dailymail.co.uk/sciencetech/article-3196460/Could-charge-phone-BRAIN-Human-body-generates-electricity-fuel-iPhone-70-hours.html#ixzz4bQH87lZ1
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