Question: how many kwh does it take to charge an iphone?
Answer: The iPhone 6 consumed 10.5 watt-hours to charge, taking 1 hour and 48 minutes. Multiplying 0.0105 kWh/day by 365 days = 3.83 kWh per year. At the average US residential rate of $0.1229/kWh, annual charging cost is projected to be $0.47 per year.