DIY High Power Spot Welder using UPS Transformer

I always wanted to make a high power Spot Welder by using microwave transformer but it costs more than it's required usage, so I while I was trying to find a suitable alternative, I found this dead computer UPS lying around, so I tested it's transformer and I found it's powerful enough to be used for spot welding purpose.
#spotwelder
#transformer
#ups
#inverter
#lithiumbattery
#diy
#aliexpress