Explain briefly how it is possible for people to charge their phones through USB ports.

A+ Guide to Hardware (Standalone Book) (MindTap Course List)
9th Edition
ISBN:9781305266452
Author:Jean Andrews
Publisher:Jean Andrews
Chapter7: Supporting I/o Devices
Section: Chapter Questions
Problem 21RB
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Explain briefly how it is possible for people to charge their phones through USB ports.

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