HiLetgo 5pcs TP4057 1A 3.7V Lithium Battery Charging Board with Protection Type-C USB C Li-ion Battery Charging Board Over TP4056

The media could not be loaded. Good for my project although small warning they do get hot so I suggest you be careful also when soldering wires be very careful and precise you may accidentally remove one of it’s tiny components. I’d say if your project can fit the blue TP4056 ones use them they seem a bit better quality (obviously they’re bigger) also doesn’t saw someone else’s comment on it saying it has a tpb4056 Wich is true but the model for the circuit board is just named a tp4057. Way overpriced for 5 but you know what i got it in time for this project usually I go on ali exp Ali baba or some other Asian website.

Compact and Lightweight – Ideal for integrating into small projects without adding bulk.

Good

Working great for my projects so far, like the blue charging light

Worked right the first time

It’s perfect. Just what I needed to test proto products. Of course I would never spend this much on this product when production time comes. .87 cents each on another website I know of. Bulk of course.

1. The boards were not loaded with TP4057, as advertised, but with TP4056, which is very similar. The difference between chips is in setting the charging current, but the resistor value on the board was selected for the latter one.2. The bottom layer of the board acts as a heat sink. When charging the fully discharged battery, the power dissipated in TP4056 is the largest, and the booard gets very hot (about 85 deg C). The board could be somewhat bigger so the heat sink was bigger (and cooler).3. The board does not have mounting holes, so using it as a module in the project is problematic. Again, the board could be bigger and have mounting holes.Other than the above, the board works.