18650 + PCB battery box

thingiverse

I revised the design of ffleurey's excellent AA battery holder to make it more versatile and easy to use. The new model uses springs or tabs shown in a photo, which can be purchased for about £1 per ten pairs on eBay. The 66mm version is specifically designed for Samsung ICR18650-26F (pink flat top) and unprotected GTL red Li-Ion batteries. It has more adjustable features than the original design and includes some code improvements to make it easier to work with. The solder tab now meets the wire channel, and the +/- text at the bottom has been removed since it didn't print well on the original. The 66mm model is also a bit wider than the original, making it more accommodating for different types of batteries. After test printing, I found that they are quite tight length-wise, so you may need to adjust the design further when you receive your battery contacts in the mail. The 69mm version fits Soshine LiFePo4 black and Panasonic/Sanyo NCR18650A green/red li-ions but lacks some of the optimizations present in the 66mm model. If you want to make changes to one, it's recommended that you use the 66mm design instead. Unfortunately, the battery springs/plates I ordered from eBay were 19x12 rather than the expected 14.5x9 size, so I had to modify the design for my latest project. The new design is shown in a photo with a pink battery and three green boxes. It also features no screw tabs and a wider wire channel, allowing both wires to exit from the same side. I removed the polarity markings as they didn't print well either.