20pcs TP4056 Type-C USB 5V 1A 18650 Lithium Battery Charger Module Li-ion Charging Board TC4056A with Dual Protection Function

Used one of them so far and seems to work well. Has led light so can see when it's charging etc.

At around 50p each they were a bargain, I have already used 6 of them to convert 2 x AA battery (3v) gadgets into USB-C rechargeable, they are also very useful for new projects. I found them easy to solder and the markings are beginner friendly where to wire. So far they have been reliable in charging and powering 3.7v devices. The only problem is they have no holes for screw mounting which is problematic, I will likely make myself some little housings unless I find another way.

Nice and simple to use. Just snap off the one you want. Connect your cables and away you go. For the cost nice value for money get what you pay for.

Works great. One review complains that it doesn’t negotiate usb-c, no it doesn’t, this is a charger with charge/discharge protection. They need a trigger board, of which there are many. This does what it does just fine, making all those battery products rechargeable. * * * * *

Obviously not used all of them but of those I have, they have worked as expected. Nice quantity for a great price.

While they do work, they are just the USB Micro bored with a USB-C connector soldered on instead. This means that if you plug this into a real USB port that fully supports USB-C standards it wont change because it doesn't have the resistors to tell the charger that there is something plugged in. If you use an older charger that doesn't support any form of quick charging it will charge fine though.

Amazing quality according to more amazing price

Works as advertised. Used to up-cycle a battery from a disposable vape as a solar charged power source for a ESP32 weather station I built. Works properly, just solar to input, battery to battery terminals and the output to the ESP32's 5v rails.