I found this USB charger, which is unusual/rare because of the horizontal orientated ports. This makes it useful for USB Voltmeters on each port just-mobile.eu/alucharge-eu.html
I would buy a certified socket from a respected retailer in your country so you know it has passed all the safety tests.
I bought 4x UK USB sockets from china, I found that the earth connection did not make contact with the plugs earth pin at all on any of the 4, I contacted the seller and got a full refund and binned the possibly lethal sockets.
Buy quality when you are working with mains ac voltage.
Well for that price you have almost ever issues. I don’t know if a good one exists, the thing from Busch & Jaeger has below 1A and for the price of this http://www.amazon.de/dp/B018KM3QVE
you get two x6 Anker USB charger.
@HKJ
If you consider these, please very thoroughly test
- heat development (especially with one cell discharge)
- unbalanced charge termination and
low discharge protection.
My Soshine E5 (aka TOMO V8-3) has serious issues in all these departements.
Gravest one: 2 cells in parallel went down to ~2.15V over night; I then tested with a single cell (just left in the case, nothing attached) and halted the test at 1.86V resting. Pretty scary.
The layout may not be safe, but these drawing are usual not very precise (Problem may be spacing between high/low volt at the transistor and rectifier). Some yellow tape will fix this (There will probably also be some around the transformer also).
What they have illustrated is fuse, two (probably) common mode coils, safety capacitor, switcher controller and transistor. The rectifier diode looks a bit strange with too many pins.
Bridge rectifier and opto coupler is probably on the other side.
Be careful with untested USB C chargers, even though it is the future of USB connectivity, it is still very unsafe. It might take a couple years for it to fully standardize.
You could take a look at YZXStudios stuff, like the ZY1271 which has two usb-c ports and ZY1273 which has one. I shot an e-mail to Franky Tong for some info on obtaining one or both.
The ZY1273 is $42,99 shipped from Franky, I already know that, so I expect the ZY1271 to be about the same or maybe a few dollars more. As soon as I get a reply, I'll post more info.