Aliexpress Spot Welder fixing and testing

I have found a video how to fix this welder Mosfet burn issue – and decided to test this myself

you can buy them here: Aliexpress:



LIFEPO4 batteries aliexpress:

SM8124 on Aliexpress:

SM8124 on amazon:

SM8124 on ebay:

What do you think?

Written by RoeeBloch

High voltage DC to DC board

Aliexpress 3S 4S 100A BMS – Heltec BMS not balancing and not protecting cells?