I bought this charger from eBay
https://www.ebay.co.uk/itm/164926665130
I'm no expert on reviewing chargers by any means but I'm thinking this one is awful.
It weighs 25g
The listing claims 5v 1A, at around 480mA it cuts out.
No tools required to open it, I could just pull it apart by the pins.
To the best of my knowledge the seperation between the high and low voltage sides is very poor
Hi-voltage side highlighted, most places it's much less than 1mm, this is very dangerous.
Another thing you will notice is it was incredibly filthy inside this thing, how they managed that I have no idea.
And finally what the output actually looks like
1.31v peak-to-peak voltage, very noisy, I will not be using this for anything, if anyone wants the board for further testing its yours.