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Copper hard to weld? The UF20B handles it easily. Copper hard to weld? The UF20B handles it easily. UF20B all-new supercapacitor spot welder: welds copper, welds 0.4mm

AWithZ Official · OfficialFollow
Official · Douyin›Official›UF20BReport
Adaptive · 720 / 480Playback info 01:05
Official post
PlatformDouyin · AWithZ Official · Douyin
ModelUF20B
TypeProducts & reviews
Resolution1280x720
Published2025-05-04 13:00
MaterialsCopper
32 16 48 5
Released 2025-05-04Official

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
Buy nowAdd to list

Description

Copper hard to weld? The UF20B handles it easily. Copper hard to weld? The UF20B handles it easily. UF20B all-new supercapacitor spot welder: welds copper, welds 0.4mm #AWithZSpotWelder #ElectronicsHobbyist #diy #HighPerformanceTools #GoodFinds

Bill of materials

Copper

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.
#AWithZ spot welder#electronics hobbyist#diy#high-performance practical tools#good finds

Made with

UF20B
U-series flagship: 10.5kW / 1750A, 2×100…
View on awithz.com ›

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Comments 48· 11 real comments collected

HotNewest
Post
R
RC改装人10 mo ago · Yunnan

0.2 copper strip + 0.15 nickel strip, will that work? (creator replied)

LikeReplyReport
Post
零
零余额1 yr ago · Guangdong

Mine can't weld it even at max

LikeReplyReport
Post
A
AWithZ阿威兹点焊机视频号1 yr ago · Guangdong

The standard version is recommended for up to 0.15mm copper, and you need flux

LikeReplyReport
Post
无
无羡8 mo ago · Hubei

Can it weld the negative of Jiashikai cells? They say it can't (creator replied)

LikeReplyReport
Post
老
老天爸爸最爱的崽1 yr ago · Japan

Why won't mine hold when I weld?

3ReplyReport
Post
用
用户21960532693099 mo ago · Tianjin

Lots of tricks in this video; mine can't even do 0.1 copper.

1ReplyReport
Post
无
无人像你1 yr ago · Guangdong

Does it count as a solid weld if only one spot tears?

LikeReplyReport
Post
吴
吴吴吴5 mo ago · Jiangsu

My same-model AWithZ won't hold

LikeReplyReport
Post
C
Cpuggyy10 mo ago · Beijing

The stock pen is no good, a home-made pen works; the stock pen's internal resistance is a bit high

1ReplyReport
Post
沈
沈阳电路跳闸维修8 mo ago · Liaoning

Weld just one spot?

LikeReplyReport
Post
资
资深外贸人Luis1 yr ago · Guangdong

How much

LikeReplyReport
Post
老
老天爸爸最爱的崽1 yr ago · Japan

Why won't mine hold when I weld?

3ReplyReport
Post
用
用户21960532693099 mo ago · Tianjin

Lots of tricks in this video; mine can't even do 0.1 copper.

1ReplyReport
Post
C
Cpuggyy10 mo ago · Beijing

The stock pen is no good, a home-made pen works; the stock pen's internal resistance is a bit high

1ReplyReport
Post
R
RC改装人10 mo ago · Yunnan

0.2 copper strip + 0.15 nickel strip, will that work? (creator replied)

LikeReplyReport
Post
零
零余额1 yr ago · Guangdong

Mine can't weld it even at max

LikeReplyReport
Post
A
AWithZ阿威兹点焊机视频号1 yr ago · Guangdong

The standard version is recommended for up to 0.15mm copper, and you need flux

LikeReplyReport
Post
无
无羡8 mo ago · Hubei

Can it weld the negative of Jiashikai cells? They say it can't (creator replied)

LikeReplyReport
Post
无
无人像你1 yr ago · Guangdong

Does it count as a solid weld if only one spot tears?

LikeReplyReport
Post
吴
吴吴吴5 mo ago · Jiangsu

My same-model AWithZ won't hold

LikeReplyReport
Post
沈
沈阳电路跳闸维修8 mo ago · Liaoning

Weld just one spot?

LikeReplyReport
Post
资
资深外贸人Luis1 yr ago · Guangdong

How much

LikeReplyReport
Post
R
RC改装人10 mo ago · Yunnan

0.2 copper strip + 0.15 nickel strip, will that work? (creator replied)

LikeReplyReport
Post
零
零余额1 yr ago · Guangdong

Mine can't weld it even at max

LikeReplyReport
Post
A
AWithZ阿威兹点焊机视频号1 yr ago · Guangdong

The standard version is recommended for up to 0.15mm copper, and you need flux

LikeReplyReport
Post
无
无羡8 mo ago · Hubei

Can it weld the negative of Jiashikai cells? They say it can't (creator replied)

LikeReplyReport
Post
老
老天爸爸最爱的崽1 yr ago · Japan

Why won't mine hold when I weld?

3ReplyReport
Post
用
用户21960532693099 mo ago · Tianjin

Lots of tricks in this video; mine can't even do 0.1 copper.

1ReplyReport
Post
无
无人像你1 yr ago · Guangdong

Does it count as a solid weld if only one spot tears?

LikeReplyReport
Post
吴
吴吴吴5 mo ago · Jiangsu

My same-model AWithZ won't hold

LikeReplyReport
Post
C
Cpuggyy10 mo ago · Beijing

The stock pen is no good, a home-made pen works; the stock pen's internal resistance is a bit high

1ReplyReport
Post
沈
沈阳电路跳闸维修8 mo ago · Liaoning

Weld just one spot?

LikeReplyReport
Post
资
资深外贸人Luis1 yr ago · Guangdong

How much

LikeReplyReport
Post
Show 3 more comments