how much energy does it take to charge a cellphone?

how much energy does it take to charge a cellphone?
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1 Answer

Answer :

answer:Its hard to say without knowing what phone you have, but the short story is, you wont save much at all. I believe the idea behind the solar chargers, is the convenience of charging when you are away from the grid, hiking or sailing for example. a Razr V3 cell phone uses 7.6V @ 800milliAmps for about 2 hours to become fully charged. The electricity drawn by the power supply is approximately .006 kW/h x 2 hours. In my hometown, we pay 15 Cents per kwh. So 1 charge cycle for my cell phone is costing me literally a fraction of a penny. Even if I needed to charge my cell phone everyday, (which I dont) My yearly cost to charge would still be very low.
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