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0.15 copper stacked on nickel-plated strip, the result)

Xiangzi WorkshopFollow
Welder reviews›Review›UF20B· ProfessionalReport
Adaptive · 480Auto subtitlesPlayback info 00:58
Welding Recipeno level stated on camera
ModelUF20B00:00
ModeAuto / manual selectable; trigger switch on the pen00:42
Material0.15 nickel stacked on 0.15 copper strip00:08
Strip thickness0.15 mm00:08
Copper strip thickness0.15 mm00:08
Cell18650 (on screen)From the image
Comments: the pen cable must be 15 mm², 8 mm² won’t weld copper; cable runs hot

Creator’s own settings as stated in the video (timestamps link to the moment). Not official values — test on scrap first.

Released 2025-11-25ReviewLevel Professionaldigest confidence 0.8

Bill of materials

Welder, accessories, consumables and parts used in this build; quantities and specs are editable Download BOM
AWithZ official
UF20B spot welder
×
¥569.9–599.9
WP120 Smart Pen (8 AWG)
×
¥39.9
Nickel-plated steel strip
×
from ¥5.9
Copper strip
×
See store
Flux
×
¥13.9

Description

Xiangzi Workshop (dealer), 57 seconds: tested the UF20B on livestream welding 0.15 stacked on 0.15 copper strip directly, very strong; all-aluminum shell looks great, big color screen, the pen has a trigger switch (press down, then click), auto / manual selectable, nice welds; go see his buddy’s shop window; a comment warns you need the 15 mm² pen cable, 8 mm² won’t weld copper

Tested the UF20B’s welding ability on livestream: went straight to 0.15 stacked on 0.15 copper strip, very strong (on camera he welds a 0.15 nickel + copper stack onto a cell and shows the welds). This all-aluminum shell looks great overall, with a big color screen; the welding pen has a trigger switch, press it down and click the switch for an easy weld; auto / manual selectable; the welds all look very nice; if you need one, go to his buddy (Xiao Wang) for details, worth recommending. Comments: are the pen cables you send the same ones (I sent two kinds); why is my cable different and running so hot; you must use the 15 mm² pen cable, 8 mm² won’t weld copper.

Outcome

GoalShow the UF20B stack-welding 0.15 nickel + 0.15 copper (sales)
BuildUF20B + 0.15/0.15 stacked test pieces
ResultNice welds, very strong · verified on camera: Welds shown at 8–19s (no pull test filmed)

Steps3 steps · click a frame to jump

  1. 1. Livestream test: 0.15 stacked on 0.15 copper strip, very strong

    Tested the UF20B’s welding ability on livestream; went straight to 0.15 stacked on 0.15 copper strip; very strong (welds shown).

    00:00 – 00:19
  2. 2. All-aluminum shell, big color screen, trigger switch on the pen

    All-aluminum shell looks great overall; big color screen; the pen has a trigger switch, press down then click for an easy weld.

    00:19 – 00:41
  3. 3. Auto / manual selectable, nice welds; see the shop window

    Auto / manual selectable; the welds look very nice; if you need one, see his buddy Xiao Wang for details, worth recommending.

    00:41 – 00:57

Bill of materials

AWithZ UF20B ×1All-aluminum shell, big color screen, button pen · Demo
0.15 nickel strip + 0.15 copper stripStack-weld test

Creator’s tips

  • Press the pen down first, then click the trigger switch — manual is more controllable 00:34
  • Comments: stacking copper needs the 15 mm² pen cable, 8 mm² won’t do and runs hot

Pitfalls

  • Comments: the pen cable received was different and ran too hot (the dealer shipped two kinds)

Li-ion safety

DIY lithium packs can catch fire: check cells for shorts before welding, always add a BMS, never skip insulation and fusing on high-current builds.

Quotes

“We tested 0.15 stacked on 0.15 copper strip directly — very strong” 00:08

Comments 6· 4 real comments collected

Comment insightsanswered 1 · open 1 · corrections 1

Answered by the creator

Did you ship the same welding cable?
I shipped two kinds (creator)

Open questions

How come my cable is different, it runs way too hot

Corrections from viewers

You must use the 15 mm² welding pen, the 8 mm² one can’t weld copperPlausible
Pen cable gaugeRunning hotSales channel
帅
帅哥哥9 mo ago · Guangdong

Did you ship the same welding cable?

祥
祥子手工坊9 mo ago · Hebei

I shipped two kinds

家
家人们9 mo ago · Jiangsu

You must use the 15 mm² welding pen, the 8 mm² one can’t weld copper

卖
卖工具的洪叔9 mo ago · Sichuan

How come my cable is different, it runs way too hot

帅
帅哥哥9 mo ago · Guangdong

Did you ship the same welding cable?

祥
祥子手工坊9 mo ago · Hebei

I shipped two kinds

家
家人们9 mo ago · Jiangsu

You must use the 15 mm² welding pen, the 8 mm² one can’t weld copper

卖
卖工具的洪叔9 mo ago · Sichuan

How come my cable is different, it runs way too hot

帅
帅哥哥9 mo ago · Guangdong

Did you ship the same welding cable?

祥
祥子手工坊9 mo ago · Hebei

I shipped two kinds

家
家人们9 mo ago · Jiangsu

You must use the 15 mm² welding pen, the 8 mm² one can’t weld copper

卖
卖工具的洪叔9 mo ago · Sichuan

How come my cable is different, it runs way too hot