DIY SPOT WELDER SHOWDOWN - BIFRC vs JQ-DHJ

I compare the power and performance of the two best DIY spot welders on the market. Both are excellent. The BIFRC is slightly more powerful but isnt as consistent and gets very hot. The JQ-DHJ makes consistent spot welds and stay much cooler. The JQ is going to become my day to day spot welder. Link to JQ-DHJ spot welder https://s.click.aliexpress.com/e/_ACyI4L https://s.click.aliexpress.com/e/_9uuIGx https://s.click.aliexpress.com/e/_A7Ryr1 Link to BIFRC spot welder https://s.click.aliexpress.com/e/_AOvbd5 https://s.click.aliexpress.com/e/_AUpuPz Link to Lipo Battery https://amzn.to/3wmNjUX