What is PPS ? - PengoHome.com
USB charging
USB hardware - Wikipedia
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How does a USB C port provide the power to charge laptops? - Electrical Engineering Stack Exchange
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What is USB Power Delivery and how does USB PD work?
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USB charging
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How USB Charging Works, or How to Avoid Blowing Up Your Phone - ExtremeTech
USB in a NutShell - Chapter 2 - Hardware
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How does USB Power Delivery work with voltages above 5V without damaging 5V peripherals? - Electrical Engineering Stack Exchange
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USB hardware - Wikipedia
How do I power my Raspberry Pi? | The Pi Hut
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