How to Make a DIY Spot Welder for Lithium Ion Battery Packs
Cheap Spot Welder ~50$ - ESK8 Electronics - Electric Skateboard Builders Forum | Learn How to Build your own E-board
Mini Spot Welder Machine, Portable Transistor 18650 Lithium Battery for Capacitor, Welding Tools, with Automatic Welding Mode, Single Chip Microcomputer Control and LCD Display Screen - Amazon.com
Showdown Of The Crappy Ebay Battery Spotwelders : Which One Really Sucks The Least? | ElectricBike-Blog.com
Review: Battery Spot Welders, Why You Should Buy A Proper Spot Welder | Hackaday