AWithZ U2
The classic
Dual pulse with 90 levels, auto mode, 1.3" LCD, 5000/7500/11000mAh, welds 0.3mm.
Before any lithium battery work, read the AWithZ Safety & Usage Guidelines ›
What people build with U2
Real works from the WeldWorld creator community
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Highlights
Powerful dual-pulseFirst pulse breaks the oxide layer, second precisely controls temperature and melt
Only brand-new Grade-A cellsNo high-drain, risky B/C-grade cells
1.3-inch LCD · 90 levelsAuto mode
U2
Powerful dual-pulse
The first pulse breaks the oxide layer, the second precisely controls temperature and melt; dual-pulse scheduling balances weld strength and quality.
U2
Only brand-new Grade-A cells
No high-drain, risky B/C-grade cells — Grade-A cells are safe, durable and hold their charge.
U2
1.3-inch LCD · 90 levels
Auto mode.
Weldable thickness (mm, MAX)
Nickel-plated steel strip0.3
Lab maximums; results vary by material and environment.See all nine spec groups ›
Use cases
Compatible accessories
Related models
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
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
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
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
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