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A state-of-the-art iPhone features a battery of ca. 3000 mAh capacity. The battery features an open...

A state-of-the-art iPhone features a battery of ca. 3000 mAh capacity. The battery features an open circuit voltage of 3.7 V. Given that power=voltage´current. And assume that each fully charged battery lasts 2 days of normal usage. How many days of usage can we sustain if we could transfer all energy we consume a day to power an iPhone?

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