Power supplies, storage, and batteries (and the devices that incorporate them) are the two electronics things Chinese engineers will tell you not to buy at a market for cheap. The quality ones are ones you can find for a consistent above average price from multiple vendors in the malls… and even then it is a risk. I’ve had a lot of success with wired electronics using USB power, AA batteries, cables of any kind, and it’s a great place to buy tools to work with electronics. I might be confident enough to buy power electronics now.
Same goes for clothing with black dye and several other goods common in these markets. The locals tend to know what materials are dangerously cheaped-out on.
