What’s the most energy-efficient way to charge my cellphone?

Grist
By Ask Umbra®Oct 13, 2014, 6:48 am107 pts
Q. I wanted to know if it saves electricity to charge a phone or music player from the USB port of a computer vs. a plug in the wall. Provided the computer was going to be used for work in addition to charging via USB port. Jesse G.Nashville, Tenn. A. Dearest Jesse, Never have I regretted my decision to drop…

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