TehWildMan_ t1_jdyqnae wrote on March 28, 2023 at 4:03 AM

The AC side voltage/frequency doesn't matter as long as you have a wall adapter that works for that situation. The device being charged sees a USB power source and doesn't care what's driving that.

(Also note that many, but not all, common wall-plug USB power supplies are natively designed to work under both voltages. It's usually just matter of having the appropriate plug adapter to connect the pins from whatever sockets are used abroad)

historyguy2 OP t1_jdyqr5z wrote on March 28, 2023 at 4:05 AM

So USB has its own voltage and the 120/230 v doesn’t matter so much with USB?

TehWildMan_ t1_jdyr19d wrote on March 28, 2023 at 4:07 AM

Yes, the USB cable is carrying 5 (or 9/12/15/20) volts direct current. Thr job of the charging brick plugged between the USB cable and the wall is to regulate AC power down to direct current for USB

historyguy2 OP t1_jdyr3vv wrote on March 28, 2023 at 4:08 AM

Thank you so much!