AWithZ Spot Welders
Pioneer & leader in compact portable spot welders | Spot welders only, done more professionally
Shop now ›Browse all models by seriesFind my welder ›7 criteria to match your modelCompare models ›Compare up to 3 models across nine spec groupsParameter lookup ›Recommended settings by cell × material × model (WeldWorld)
Universal U Series
All-round step up, welding without limits
Energy storage × performance in golden balance | Thousands of fine-tuned settings | One step for advanced users & repair teams
UF20B
U-series flagship: 10.5kW / 1750A, 2×1000F actively-balanced supercapacitors, 40-second recharge at 15A, three trigger modes, 99 levels, welds 0.4mm nickel-plated steel and copper. 2-year warranty.
¥569.9–599.9$85.99–89.99Price TBD
UKF10
300g pocket supercapacitor welder: 1750A / 10.2kW, 2×1000F, 40W USB-C input with 40-second recharge, knob + 2.0" screen, three trigger modes, welds 0.35mm nickel-plated steel.
Price TBD
UK3
Twin A-grade cells (10000mAh), 1650A / 9000W, ~4000 welds per charge; knob + TFT screen, 99 levels, auto/pen/foot-switch; welds 0.3mm pure nickel and butt-welds 0.7mm stainless. ~300g, 2-year warranty.
¥279.9–299.9$41.99–44.99Price TBD
UK1
Twin A-grade cells (5000mAh), 1380A / 9000W, 1500 welds; knob + digital display, dual pulse; welds up to 0.5mm (butt), nickel/copper/steel. ~370g, 1-year warranty.
¥199–219$29.99–32.99Price TBD
U3 Pro
Card-size welder with 5000/7500/11000mAh options, 2" color screen, tuning combos and smart pen support; welds 0.35mm nickel-plated steel / 0.1mm copper; doubles as a USB power bank.
¥259.9–299.9$38.99–44.99Price TBD