10pcs TP4056 Charging Module with Battery Protection 18650 BMS 5V Micro USB 1A 18650 Lithium Battery Charging Board

Works great

Awesome product @ a great price! I'm using these to make rechargeable battery packs with salvaged Li-Ion cells. Very easy to set-up and use and the size makes it easy to fit inside small project boxes. I like these so much I actually made 2 videos highlighting this part AND I plan to order more soon for some experimenting (new project ideas). Thanks for a great product, price and prompt delivery, Dialed In DIY.

Though the Li Ion battery protection/charger modules that I ordered were very well made, one of the 10 that I purchased arrived physically damaged. They were so inexpensive, I was just going to let it go. When Maker Focus emailed to confirm that I was satisfied, I let them know about the damaged module. Since they couldn't immediately mail a replacement they offered a refund. I will certainly be buying from them again.

The seller contacted me after the review and offered to replace the modules. I have not tested them yet, but I changed the rating from 3 stars to 4 to reflect their commitment to customer service. Original review: 3 stars, Inconsistent quality across the modules. 6/10 work fine. Out of the 10 pieces, a few were defective: - 1 keeps draining the battery with no load attached. - 1 keeps on charging when the voltage exceeded 4.2V - 2 unable to provide usable power output (work okay for low current, but will cut out around 200 mA draws) The rest work fine. I ended up having to make a test jig to test them.

I had one board burn up on the first try. I ended up buying some thermal pads and repurposing a heat sink I had laying around. Now I can charge my flashlight batteries at work. Using a heat sink keeps the temperature down which I'm positive will extend the life of these little circuits. For my second project, I changed the resistor (R3) to lower the charging amps. I added just the thermal pad to this one and it doesn't warm up that much.

When the blue LED came on with power, I felt like the Mogwai in "Gremlins"- "Bright lights, bright lights!" - dang, that thing is bright. Just waiting on a soldering iron to affix the crocodile clamps I bought separately and we'll get to charging!

There are no mounting holes to secure the board. I used double stick tape. There is a force applied to the board when plugging and unplugging the micro usb plug.

I bought a six pack of these, tested all of them and they worked perfectly, the quality of manufacturing exceeded my expectations. Would recommend this product to anyone.