Review on SUNKKO 737G+ Battery Spot Welder, Pulse Welding Machine for Lithium Battery Pack, Compatible with 18650 and 14500 Batteries, Works with 0.35mm Nickel Strips, 110V by Nathan Ortiz

I love this business. I just did 70 spot welds in quick succession and it performed like a champ considering it was pretty warm up until then and needed to cool down. The settings are a bit strange, you have to change the number of pulses under the button's pins and on the screen. Once you get the settings for what you're working on, this thing will get the job done just fine. One thing you might want to consider is buying a deoxytherizer or thermal paste to strengthen the connection for an external impulse welder. After 800+ spot welds the connectors came loose and I had to put some deoxygenate in there because it sparked and fought the connection. Immediately after applying the conductive compound that strengthened the joints, the increase in productivity was clearly noticeable. If you are struggling with sticky welds, ALWAYS consider adding some conductive paste.