[Cheap Chinese battery spot welder](https://www.amazon.com/gp/product/B08JLJKKYN/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) for making my own 18650 lithium battery packs. Use a 3S (11.1v) LiPo battery pack with at least 1300mAh and at least 75C (preferrable 120C) discharge rate. Connect with XT60. Mods: https://www.youtube.com/watch?v=u5khY6d3qds 1000uF 16V Capacitor for the mod: https://www.digikey.com/en/products/detail/kemet/ESH108M016AH2AA/3082968 Spare MOSFETs: https://www.digikey.com/en/products/detail/infineon-technologies/IRL40SC228/6834099 0.15x5mm pure nickel strip: https://www.amazon.com/gp/product/B08RJ97W8P/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Settings to try: - 10ms pulse, 35 weld energy