If you need a high-quality mini spot welder, this is going to be the most valuable message you will ever read.
Youtube channel personally tested / review -------
This mini spot welder makes it possible for anyone without a little mechanical ability to make their own rechargeable battery packs. All you need is some 18650 batteries, some electrical tape and this handy tool.
You can learn more through the video.
Mini Spot Welder for DIY 18650 Batteries is now available for immediate purchase! This is a MUST-HAVE if you have any interest in making your own battery packs. You can get it through here: https://tinyurl.com/bd66v7en