This is one of the worst electronic gadgets that my workshop has every seen, a US TEO Brand A5951 USB charger. Usually, not much can go wrong with the design of a 5 V switchmode power supply, but with this device, all went wrong, a combination of bad design, bad manufacturing, and non-existing sense for product responsibility.
Can you see the wires – right hand side is low voltage side, left hand side is mains! Can you see the solder stuck to the board – almost connecting mains and low voltage?
The only “safety” function I can see if a PCB trace fuse (left hand side zig-zag) on a mildly flammable paper board.
Even the case isn’t sealed – the manufacturer is even saving the glue!
That’s the brand name and numbers, if you have one of these, take it out of service immediately!
Seems Canada has some clever authorities – they found a whole lot of unsafe USB chargers. Remember the good old days when it was illegal to import just any kind of crap?