performance Circuit board equipment with frequency capacitance, low internal resistance, and a temperature tolerance up to 105 C. This design supports stable operation and reliable performance in demanding conditions. Easy to use The spot welder features convenient output lines on both sides for straightforward welding. They are marked in Chinese to help prevent incorrect connections and miswiring, simplifying setup and use. Solid material The spot welder pen set is constructed from metal, providing a stable structure, strong durability, and a long service life. Improve efficiency The welding machine uses a thick copper tube, 10 AWG wire rod, and an alumina copper spot welding needle to ensure current carrying capacity and efficient welding. Use scenarios Welding battery tabs or nickel strips on lithium battery packs during or assembly, enabling strong, reliable connections. PCB assembly or where precise spot welding of thin metal leads or connectors is required. Smallscale production or DIY projects that involve spot welding thin metal sheets or tabs, benefiting from durable construction and current capability.