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
Review: Battery Spot Welders, Why You Should Buy A Proper Spot Welder | Hackaday
IXTIX Battery Spot Welder Kit Mini Handheld Spot Welding Machine for 18650 Battery Portable Adjustable Spot Welder with Foot Pedal Rechargeable Spot Welding Machine Pen - Walmart.com