Self-balancing Spot Welding Pen

I have replaced the original spot welder pen with this Self-balancing Spot Welding Pen.

Previous review video:    • Cheap spot welder Unboxing & first Test  
Tear Down this spot welder video:    • What inside cheap Spot welder? TEARDO...  
Adjustable battery holder:    • Making Adjustable Battery Fixture fra...  
Disc sander in this video:    • DIY 12v DC Fan... Disc Sander !!  

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Aff links:

Capacitor Spot Welder 0.3mm Portable https://s.click.aliexpress.com/e/_Dcf...
Spot welder automatic trigger handle pen: https://s.click.aliexpress.com/e/_Dnp...

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