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Four Litres of Petrol Can Power an iPhone for 20 Years

By Casey Chan on at

It's true. According to Bill Colton, a VP at ExxonMobil, four litres of petrol has enough energy to charge an iPhone once a day for 20 years. Of course, that's never going to happen, but it's a point ExxonMobil uses to stress the fact that there is a lot of energy in petroleum.