18650 Holders

Seems it was just a couple of batteries that had the issue of not providing contact with each other. Not an issue with the holders themselves. But I will have to setup the holders with a through hole for the battery sensing wire for the BMS. That will make sure this will work for any battery. As it is now I will definitely have to test the batteries I want to use in these holders.

Seems when I printed my 3rd pair of holders the positive end does not connect to the negative of the other battery. This worked fine for the first time using these batteries i the first two holders I made, but when I tested the third one they didn't. I even tried the first two again and now they don't work for them either. Most of the 18650 batteries I have do have little bits of the nickel connector that was spot welded to the batteries when they were part of the part of the laptop battery that I pulled them from. The ones I am testing with I managed to get all of that connector off them. 

I do have a bunch of 18650 batteries I bought years ago that have the button caps on them and those work fine. As well as the batteries that still have the bits of the connectors stuck to them. 

I do plan on having some type of washer of wire with a bit of solder on it t put between the batteries when I plan on adding a BMS to to them. That certainly will work for making that connection, but I was hoping not to have to rely on that.

Added a like to my fog flashlight video on my You Tube channel. It makes use the PVC pipe 18650 battery holders.

Adding to the description, The 3D printed holders use a twist lock. I do still need to add a retaining block so you have to push and twist the pieces to separate or join them. I have uploaded the STL files and the FreeCAD files to my github. The twist does use the standard lefty loosy and righty tighty action.