‹ AWithZ Academy
UF20B course
10.5kW supercapacitor power, welds 0.4mm and copper
Hands-on & reviews11 lessons
1
![[Welding demo] Precise control — 0.15mm*2 copper](https://cdn.awithz.com/assets/_derived/wfull/community/works/d100/cover.webp?v=7b9bce29.q82)
![[Welding demo] Powerful output — 0.4mm*2 stainle](https://cdn.awithz.com/assets/_derived/wfull/community/works/d098/cover.webp?v=7b9bce29.q82)
![[Welding demo] Handles 0.25mm*2 pure nickel with](https://cdn.awithz.com/assets/_derived/wfull/community/works/d097/cover.webp?v=cd22ab38.q82)
![[Welding demo] Handles 0.4mm*2 nickel-plated wit](https://cdn.awithz.com/assets/_derived/wfull/community/works/d099/cover.webp?v=7b9bce29.q82)
UF20B Spot Welder strong welding strength, 99 speed accurateYouTube · UF20B · 667 views
01:152UF20B Spot Welder, manual/automatic/pedal, 3 welding modes, YouTube · UF20B · 561 views
00:4430.1mm copper sheet can be easily welded, UF20B makes fine weYouTube · UF20B · 343 views
00:304Perfect welding! Easily complete battery spot welding, coppeYouTube · UF20B · 49 views
00:455Repair master, absolutely worth having a repair artifactYouTube · UF20B · 36 views
00:456Watch you! Nearly 10 million users are concerned about the mYouTube · UF20B · 32 views
00:457[Welding demo] Precise control — 0.15mm*2 copperDouyin · UF20B
00:458[Welding demo] Powerful output — 0.4mm*2 stainleDouyin · UF20B
00:439[Welding demo] Handles 0.25mm*2 pure nickel withDouyin · UF20B
00:5610Thousands of fine-tuning combinations, easy weldDouyin · UF20B
00:2811[Welding demo] Handles 0.4mm*2 nickel-plated witDouyin · UF20B
00:47
Builds & projects5 lessons
12
Quick & simple judge 18650 lithium battery is good or bad! EYouTube · UF20B · 268 views
01:3013This is how a perfect weld on a 32140 LiFePO4 ceDouyin · UF20B
00:1314A must for DIY players: build your own 2S batterDouyin · UF20B
01:0815Ultimate performance, precise welding! Ultimate Douyin · UF20B
02:2316One shot, perfectly formed, never a cold weld! PDouyin · UF20B
01:18
Products & reviews0 lessons
Know-how0 lessons
FAQUF20B
No weld after power-on, or welds turn black — what to do?
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.
How often do I change the pins, and how?
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.
How do I store it long-term?
Supercapacitor models need no charge maintenance — store them dry at room temperature; on next use, plug in for about 10 seconds to recharge.
Anything unclear in this course?
Tell us which step or which model is missing and we will add lessons.