Mudder 20 Pieces Charging Module Battery Charging Board with Battery Protection BMS 5V Micro USB 1A 186 50 Power Module

Most worked, only few of them not working (I'll check the soldering or something ?? or maybe when I break the boards apart, bending caused solder join problem. Will check if I have time). Some of you confused about their instruction and Notices (I agree, I have to guess myself). Here is my own Notes: This board used CL4056A (Li Charging Processor), R3=1.2K is prog charge current set for 1,000mA, 8205A is dual FETs to disconnect the Battery from over charge/discharge (that is why it’s in between OUT- and B-), DW01A little guy is Li Protection Circuit (it senses voltage then control the 8205A FETs). The DW01A rated at 3A short current but the overall charging current of this board is 1,000 mA (R3=10K for 130mA, R3=1.2K for max 1,000mA). B- is near OUT- voltage (FET On/Closed), B+/OUT+ came from Pin5 of CL4056A (Battery Output = 4.2V for Li battery)."Notice: please note that the charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will break directly."I think they mean: The Pos and Neg (OUT+ & OUT- at the Load/Battery) can not be wired wrong, otherwise (ex: you connect OUT+ to the Battery Neg) the board will break/burned/damaged.

This is a fantastic value for 20 pieces of this charging board. They do charge at a maximum of one amp and I verified that with amp meter. All 20 of them Works without any issue whatsoever. They are very simple two wire into your circuit and I have no issue whatsoever charging 3 batteries at the same time, 3.7 volt lithium ion 18 650 and lithium bag cells. These will also apply a maintenance charge on to your cells if they sit because they naturally will slowly dissipate power but this prevents that. This is definitely the best deal on Amazon and even better than what you can find on auction sites. I definitely highly recommend these. And don't worry about the standard USB input because most of the time I find myself and others soldering the 5-volt in directly to the board.

Nice tiny battery charging board. These along with a battery holder such as https://www.amazon.com/dp/B07QVPD9RB, some solder and a little hot glue and I have 20 18650 battery chargers for about $1.10 each.I was concerned that breaking the boards apart would stress the solder joints and components but they all seem to be working.

Es justo lo que esperaba, vienen en cantidad y su labor la hacen excelente, justo lo que esperaba don pequeños en lo personal me cargan bien, con sierto retraso claro pero tardan lo esperado

I got these and some single 18650 battery sleds so I can keep my batteries charged. I had to trim down the sleds so the batteries were able to be put in and taken out, because it's a VERY tight fit! Besides that and the LEDs on 5 of the charging modules not working properly, 15 out of 20 working isn't so bad. If I could get some that didn't have that issue, I would order more

Claro que está bien, lo utilizaré para trabajar mis baterías.

Some of these don’t work completely. I assume they test these before distributing them but at most they only tested the LEDs that indicate charging or ready to charge/finished charging. They must not have tested if the battery that is being charged through the module can actually discharge through the “out +/-“ pads that lay next to the “Battery +/-“ pads because they don’t always. And on occasion the pads themselves seem to detach even with proper and prompt use of soldering iron. This tells me that the pads are cheap and thin as compared to standard pads of that size. And no I wasn’t using a big tip or have the iron too hot, and like I said I was promt about how long I keep the iron on. Even exaggerating the time it wasn’t past 5 seconds. Of the 5 or 6 I’ve used so far out of 20, two have crapped out on me. More than 30%.

Tested all of them and worked.

Perfect TP4056 modules! Works as advertised! Great for projects involving 18650 batteries!

Does what it says

Does a useful job

Shame. These don't seem to have a off switch when a device is off. Still drains the battery.