Iphone Battery – Charging via USB Port Vs Power Outlet

batteryiphone

The power outlet has more power obviously, but maybe the computer USB is suffice to charge it at maximum speed.

Is there a difference between charging an iPhone using the computer USB port and using the power outlet?

Best Answer

Here is a page where you have the result of the comparison of charging an iPhone4 from USB or power outlet.
Here is their conclusion:

Stating the obvious, the iPhone 4 takes longer to get a full charge on USB than an outlet. What you may not have realized is how big the difference was, an extra 30 minutes! That’s 23% longer to get a full charge on the USB.

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