PNGKNYOCN 18650 Battery Clip, 4 Slots 3.7V DIY Battery Storage Box in Series Plastic Batteries Case YOUCHENG for 18650 Battery with Connect Lead(4-Pack)

worked great with button end batterys.needed to adjustments for flat head batterys.the two types of 18650 batterys both work with a little help.

These are good 18605 battery holders. Works well for my project.

I have tried these in two ways, one just a straight up 12v strand of led lights (16ft or so) and 2, a little simple yard speaker I built years ago with small amp, led strip, and speakers. *used with my old 18650 batteries, amp/ lights ran about 2 hours (medium weight 18650 batteries, untested for "real" amp hour rating), and bright on the LED strand of lights for about three hours before light softening a bit (I didn't wait for full discharge) I have a few heavier 18650's from a recovery that I might try them with later, I expect those have more power/ and will run things longer. (of course, you can put multiples of these 12V sets in parallel for more Amp Hours regardless of which cells you have)

Wires are to small For 24v and the batteries are hard to get in and out quickly witch is a good thing and a bad thing depends on your project but would not use the wires unless your using it in 12v low current but funny thing for my project using them as battery testing pack design im probably going to buy more lol

Regarding "YOUCHENG 18650 Battery Clip"... Yes, it's a battery holder- nothing fancy but it works!I've used some of the all spring-tab type battery holder... they work great till you need to remove the cells for recharging, balancing, etc.. That type of holder is soooooo tight that you need some type of tool to pry the cells out... and hope you don't damage them in the process.I much prefer the spring-as-a-negative-post type holder as you only need moderate force to remove the cells with just your fingers... no tools needed.Note that the plastic case is strong/robust enough that it doesn't deform when loaded with cells and the pre-installed connecting red/black (copper) wires are heavy enough for low power loads and .2C charging.All-in-all, these battery holders do their simple job well and at do it at a reasonable price!

Works great. But doesn't like some 18650 batteries that are a little long. I had to pilfer through my stash to find non-button top batteries because the button top wont fit. I mean, they will fit but distort the casing pretty bad and pop out sometimes.

I used this in a project with a BM, soldering the BM leads to battery pack was very difficult. I would not use in a project that required attaching wires to the pack. Otherwise, just for us as is, it works and the price is right.

Great power source

Worked for my project to power a LED bar on my snow blower. Now I can blind my neighbor across the street.

This unit is not properly wired for lithium batteries. Wires started to smoke when I exceeded a tiny 2 amps. I had to re-wire the unit myself. I just fail to see the point of these when they cannot stand up to minimal loads. Part of the whole reason people use 18650s is because of their high power output. At least state the amp rating here please.