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

I wanted to make a few lamps battery powered. Saw a video of someone using a board from this exact vendor. These boards are easy to use and pretty much self explanatory. The boards did not disappoint, it worked very well and I will make sure to find this vendor for future products.

I used one of these in a project for my daughter that runs a strip of LEDs off a rechargeable lithium 18650 battery. This board charges the battery perfectly and is very small, which works great for wearable projects. Just be prepared to solder some very small and tightly packed connection points. I especially appreciate that there are solder points to add an external USB connector so you aren't required to use the USB-C port that's on the board itself To charge the battery.

Works great!, however, the product details are a bit lacking. I'm going to list a few things I've found while using them to hopefully help someone in the future who had the same questions as me. Dimensions: 18.1 x 12.1 x 4.0 mm These do not have low voltage cutoff. The battery protection board built in to the battery I was using stopped providing . I measured about 2.6v. I have not yet tested the full-charge cutoff. The resistor size for changing the charge current is 0603. (Default value is 1KΩ, (102)) I changed the resistor to the following values and tested for current and heat: 10kΩ: ~140mA, very low heat generation 5kΩ: ~250mA, a small amount of heat, but not hot to the touch. These do not have load sharing/power path functionality. The USB-C port works with PD sources @5v. The 4 through holes at the bottom (B+-, Out+-) are pitched at 2.54mm, but the IN+- do not align at this interval, so you can't place pins in those to use directly with a breadboard. Overall, these are good, simple charge boards with a very small footprint, which was perfect for my project. I would have appreciated if more details would have been available prior to purchase, but in the end, it all worked out.

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.

This one has protection built in and at a super nice price (if you like a lot of them). I use them on most all of my battery powered electronics projects, very happy with them.

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.

So far 3 of the 5 are being used. Have not used the other two yet. Those in use are working recharging the small lithium batteries like the ones in sound cards and toys.

Very compact. No issues. I used it to replace/upgrade a broken micro-USB charging port on a wireless speaker.

Perfect

These boards work well. One star off because 1. The chip installed is not a TP4057 (0.5A) but in reality it is a TP4056 (1A) in spite of the marking. If one has the curiosity to download the datasheets for the two chips you'll see that TP4057 is a SOT23 not a SOT8. 2. The supplier had no idea that the board has a protection chip equivalent to XB5352 that offers protection to over discharging. When I asked they said they didn't know,. Bu other than these clones appear to work as the real ones. My configuration was a 18650 battery and a light load

These came all connected. I was expecting them to be 5 individuals. I don’t have the means to cut them accurately. I don’t recommend this product.