I've bought 10 of TP4056 Lipo charging modules from a Chinese vendor. Tried using them in something I've built, but whenever I plug the power source in, the charge led doesn't light up. In fact it doesn't seem to react at all.
So I googled around and saw I could check it by wiring the module directly to a battery and power source, which I did, but still no reaction from the module. I'm very much new to this and was wondering if I'm doing something wrong and how to know for sure that I got 10 faulty modules, since I already tested 5 of them the same way with the same results.
Attached are the pics of the module and my testing setup - connected to 18650 battery (- to the flat bottom of it, + to the inset top), and power source (tried both computer USB and iphone charger + wall socket.)