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Handheld H Series
HF7Supercapacitor in a pen: 1060A peak, 1.5M cycles, 10-second recharge, welds 0.3mm nickel/copper — the most capable handheld in its class.H2-2026150g pen-style welder: 1060A dual-pulse, 60k-weld dedicated cell, 2000 welds per charge, 1.3" color screen with 90 levels, dual-tip needle, welds 0.35mm nickel-plated steel and copper.H1-2026125g entry model: 880A dual pulse, single A-grade cell, 1500 welds per charge, welds 0.25mm nickel-plated steel. Learn it in 3 seconds.View all H Series ›
Universal U Series
UF20BU-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.UK3Twin 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.UK1Twin 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.View all U Series ›
Professional P Series
P120DTop of the P series: 4×3000F supercapacitors, 69.2kW / 6590A, welds 2.0mm nickel-plated steel, 0.5mm copper, 0.6mm aluminium; butt-welds 6.0mm steel, prismatic Al-to-Ni/Cu; 2.4" screen with 999 levels, 15A fast charge, 4kg with hidden handle.P60F6×1000F 9V supercapacitors, 29.2kW / 3250A / 8687J, welds 1.0mm nickel-plated steel, 0.5mm pure nickel, 0.3mm copper; 2.4" screen with 999 levels, 15A fast charge (1 min), 1.5kg.View all P Series ›
Energy-storage tech
Purpose-built lithium weldersUK3Twin 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.UK1Twin 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.H2-2026150g pen-style welder: 1060A dual-pulse, 60k-weld dedicated cell, 2000 welds per charge, 1.3" color screen with 90 levels, dual-tip needle, welds 0.35mm nickel-plated steel and copper.All-new supercapacitor weldersUF20BU-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.P120DTop of the P series: 4×3000F supercapacitors, 69.2kW / 6590A, welds 2.0mm nickel-plated steel, 0.5mm copper, 0.6mm aluminium; butt-welds 6.0mm steel, prismatic Al-to-Ni/Cu; 2.4" screen with 999 levels, 15A fast charge, 4kg with hidden handle.P60F6×1000F 9V supercapacitors, 29.2kW / 3250A / 8687J, welds 1.0mm nickel-plated steel, 0.5mm pure nickel, 0.3mm copper; 2.4" screen with 999 levels, 15A fast charge (1 min), 1.5kg.
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welding pen
WP110 welding pen · 8 AWG · 1 pc40 cm / 8.3 mm² · high-conductivity copper coreWP120 welding pen · 8 AWG · 1 pc40 cm / 8.3 mm² · high-conductivity copper core · smart triggerWP110-6 welding pen · 6 AWG · 1 pc50 cm / 16 mm² · high-conductivity copper coreWP120-6 welding pen · 6 AWG · 1 pc50 cm / 16 mm² · high-conductivity copper core · smart triggerWP240 multi-function integrated pen65 cm / 35 mm² · smart spot welding · fits many scenariosWP158 welding pen · 1 pc60 cm / 25 mm² · high-conductivity copper coreBuy now ›
welding pins
H series pins · 1 pairDouble-ended pins · premium alumina copper · wear-resistant · durableWP110/120 pins · 8 AWG · 1 pairPremium alumina copper · wear-resistant · durable · for 8 AWGWP110-6/120-6 pins · 6 AWG · 1 pairPremium alumina copper · wear-resistant · durable · for 6 AWGWP158 pins · 1 pairHigh conductivity · heat-resistant · premium alumina copper · wear-resistant · durableBuy now ›
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UK3OverviewSpecsFAQBuy now

AWithZ UK3

Power-battery welding, honest thickness ratings

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.

Buy now · ¥279.9–299.9SpecsDownload manual

Before any lithium battery work, read the AWithZ Safety & Usage Guidelines ›

UK3

What people build with UK3

Real works from the WeldWorld creator community

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Highlights

Only brand-new Grade-A cellsNo high-drain, risky B/C-grade cells
1650A dual-pulse: solid 0.3 pure nickel, 0.7 butt weldTested on 18650: Ni-plated steel butt-weld 0.7mm / stack-weld 0.5mm / spot-weld 0.3mm, pure nickel 0.3mm, copper 0.15mm (0.2mm with flux)
10000mAh · ~4000 welds · 10k+ cyclesDual-engine coupling doubles efficiency — twice the endurance of a single cell
Knob + HD TFT screenMode / level / trigger / repeat on one knob, 99 levels
Three welding modesAT auto mode (smart sensing, batch) · MT hand-pen mode (precise triggering, fine work) · MT foot-switch mode (hands + feet)
Smart hand-control penA manual button controls trigger timing anytime
UK3

Only brand-new Grade-A cells

No high-drain, risky B/C-grade cells — Grade-A cells are safe, durable and hold their charge.

UK3

1650A dual-pulse: solid 0.3 pure nickel, 0.7 butt weld

Tested on 18650: Ni-plated steel butt-weld 0.7mm / stack-weld 0.5mm / spot-weld 0.3mm, pure nickel 0.3mm, copper 0.15mm (0.2mm with flux).

UK3

10000mAh · ~4000 welds · 10k+ cycles

Dual-engine coupling doubles efficiency — twice the endurance of a single-cell design.

UK3

Knob + HD TFT screen

Mode / level / trigger / repeat on a single knob, across 99 levels.

Weldable thickness (mm, MAX)

Nickel-plated steel strip
0.3
Pure nickel strip
0.3
Copper strip
0.15
Stainless strip
0.3
Iron sheet
0.3

Lab maximums; results vary by material and environment.See all nine spec groups ›

Use cases

Cylindrical cell pack assemblyCoin-cell weldingPhone & laptop cell replacementHardware & metal joiningPower-tool battery repairRC / FPV battery buildsE-bike & power battery repair1865021700Coin cellsphone cellsPrismatic cells

Compatible accessories

WP120 Smart Pen (8 AWG)
WP120 Smart Pen (8 AWG)
¥39.9
WP120-6 Smart Pen (6 AWG)
WP120-6 Smart Pen (6 AWG)
¥49.9
WP110 Spot-Welding Pen (8 AWG)
WP110 Spot-Welding Pen (8 AWG)
¥29.9
WP110-6 Spot-Welding Pen (6 AWG)
WP110-6 Spot-Welding Pen (6 AWG)
¥39.9

Related models

UK1
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
U3加强版
U3加强版
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
U3
U3
Card-size welder: tuning combos, auto/manual, 2" color screen, 5000/7500/11000mAh, welds 0.35mm. Same as U3 Pro minus the smart-pen port.
¥239.9–279.9
U2
U2
Dual pulse with 90 levels, auto mode, 1.3" LCD, 5000/7500/11000mAh, welds 0.3mm.
¥179.9–209.9

Compare models ›

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