Sunkko 787A+ Battery Spot Welder Pulse Welding Machine for 18650 Lithium-ion Battery Packs 787A+ 1 set Electric cautery pen - AliExpress
U.S. Solid BSW05 Battery Spot Welder 11.6 KW Capacitor Energy Storage Spot Welding Machine for 18650, 14500 Lithium Battery Pack Building - U.S. Solid
BINGENUO 11000mAh Mini Battery Spot Welder for 18650 with LCD Screen - 80 Gears Portable Handheld DIY Spot Welding Machine with Type C Charging, Power Bank Function, Nickel Sheet - Amazon.com