10 Pcs 1S 3.7V 3A Lithium Battery Protection Board BMS PCB Protection Board 18650 Charger Module for Li-ion Lithium Battery with Nickel Strip

After soldering up the various connections, I couldn't seem to get it to work, using a multimeter there was no output despite the battery being fully charged. Connecting the battery upto the device, and then putting it on charge triggered the protection circuit into life, and the battery is now functioning as it should. Brilliant!

May be small but used successfully to repair one of my Erbuer lights that I was on the point of placing in the recycling. Useful video on YouTube to help.

Only used one at the moment but works ok for me. My eyes are not the best so needed help identifying the connections. Seems a nice little product at the moment.

Like others have mentioned, you buy a pack of 3 and if you are lucky 1 will work. The first 2x did not work for me … I was fortunate that the third one did. Purchase at your own risk

Worked fine. No issues.

purchased 5 of these 2 did not work

I have already returned five of these which were identical but supplied by another supplier. These have the same fault. If you connect them as shown they just do not work. However connecting the top side of the battery connection to the underside of the PCB makes it work. On closer inspection the through hole plating which should connect the top to the bottom of the PCB is not through plated. I assume DAOKAI get these from the same place. It is just poor quality control (if any) at the manufacturer. Most good manufacturers can auto check the connections after production, obviously these guys do not bother. I am keeping them because I know how to fix them.

Works fine using 3x 18650 batteries, doesnt get warm when dis/charging or make your charger voltage fluctuate. the rectangular pads are not for soldering however you can remove them easily by placing the soldering iron on them for a few seconds and they side away revealing a solderable area. doesnt have screw holes for mounting, but it is flat on one side so i just use double sided tape. Because it runs cold there is no issue doing that. used it now for a month with a solar charger to charge my phone and peripherals, no issues at all.

Embakahe sencillo pero biem

Platine lädt Akkus bis zur max. Ladeendspannung 4,2 V und schaltet ab. Beim Entladen wird der Akku tiefenentladen !!!! Der Tiefenentladungsschutz funktioniert NICHT !!! Habe Leiterzüge kontrolliert und andere Fehler lt. anderen Rezessionen geprüft. Diese Fehler (in den Rezessionen erwähnt) waren nicht die Ursache. Sehr schade.

Purchased as replacement to rebuild a pack for a Sola-2500 dive light. Sola has gone out of business. Pack consists of a standard 18650 in 2S configuration. Existing pack had failed capacitor and old lipo cells. Building 3 packs in total.

These BMS are GARBAGE. Don't waste your money. 5 of 5 not working. Some of them when I try to get energy out of them they shut down to 0 volts. Others won't show the correct voltage at the P+ P-. I wanted so much time soldering, desoldering, searching the internet for answer. To the seller, do better, check what you sell.

Good