Our office recently installed new wall plugs with both the Type D plug outlet (South Africa) and a USB point to charge your phone straight from the wall, without the need for the little white charger that you’d otherwise use.
IF we can use electricity straight from the wall into the phone/powerpack/battery through a USB cable, what is the use of a charge and how exactly does it work?
In: 3
Regular mains power will instantly fry something in your phone. It’s 48 times as much voltage and your phone cannot handle that.
To use this power to charge a phone, a device must reduce the voltage before feeding it to your phone. How this is done varies and deserves its own ELI5. This device is the little charger block that plugs into the wall.
Some outlets have this device built in to the outlet itself. It still does the voltage reduction, but now it’s built in to the outlet.
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