U2 Support center
Dual pulse with 90 levels, auto mode, 1.3" LCD, 5000/7500/11000mAh, welds 0.3mm.
First make sure the pins are pressed firmly and the surface is clean; start low and step up — 0.1–0.15mm Ni-plated steel usually needs only a low-to-mid level. Look up settings by cell model × material in the WeldWorld parameter lookup.
官方实验室最大值:镀镍钢带 0.3mm。不同材料批次与环境有差异,先在废料上试焊。
Pins are consumables — dress or replace them when welds enlarge, spark often or blacken noticeably; see the manual's pin-change section and the Academy videos for steps.
锂电机型建议每 3 个月补电一次至 50–80%,避免高温与满电长期存放。
Host warranty of 1–2 years by model (2 years for UF20B/UK3/HF7, 1 year for UK1/UKF10; accessories such as welding pens excluded); 7-day no-reason returns; invoices available for genuine flagship purchases
Sample general question bank; U2-specific questions are to be added by the brand and support team. Site-wide FAQs are in the support center FAQ.