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User content: this build is the creator's personal experience and has not been verified by AWithZ. Don't copy the settings or methods directly — start at a low level and test on scrap.Safety & Use Guidelines ›
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Tool recommendation

Apprentice LiFollow
Welder reviews›Review›UK1· BeginnerReport
Adaptive · 480Auto subtitlesPlayback info 01:48
Welding Recipeno level stated on camera
ModelUK1 (spreadsheet); the video shows small / medium / large00:00Small probably H2 / H series, medium probably UK1, high power probably UF20B
CellPower-tool 18650 (two or three to four or five cells)00:19
Small one priced at ‘a hundred-odd yuan’00:26

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

Released 2026-03-21ReviewLevel Beginnerdigest confidence 0.75 · pending review

Bill of materials

Welder, accessories, consumables and parts used in this build; quantities and specs are editable Download BOM
AWithZ official
UK1 spot welder
×
¥199–219
WP120 Smart Pen (8 AWG)
×
¥39.9
Nickel-plated steel strip
×
from ¥5.9

Description

Repairman Xiao Li’s tool recommendation: repairing power tools you can’t do without a spot welder, split into small / medium / high power — the small handheld for a hundred-odd yuan, switch on and weld, on and off as needed, for people who use it a few times a month on four or five cells; the medium type needs the box opened and wired up but is also handy; high power suits people who build Li-ion packs all the time; he owns small, medium and large but uses the small one most; a reminder that Li-ion in bulk, especially while charging, is risky

Repairing power tools all the time, you can’t avoid using a spot welder; there is low power, high power, extra-high power, and this one counts as medium. Low power suits people who don’t use one often and only occasionally build two or three or four or five cells — a few times a month at most, buy the small type, a hundred-odd yuan, switch it on and click away, very handy, on and off as needed. The medium type means opening the box, taking out the main unit and hooking up the leads before welding, also handy, a bit more power. High power suits people who build their own Li-ion packs all the time for fun, also very good. Watch safety with Li-ion: two or three cells don’t matter, doing them in bulk is a little risky, especially while charging. Not often, occasional use: buy the small one; using it all month: buy medium or high power — what suits you matters. I have small, medium and large, but I use the small one by far the most, two or three times a month, sometimes not even once; I like the small one, grab it and go. 2 comments: ‘AWithZ Li-ion spot welders suit individuals / small repair shops, industry-leading, good materials, no corner-cutting, miles ahead of the rest’ (sounds like official / promotional copy).

Outcome

GoalWelder selection advice (small / medium / large)
BuildAWithZ small handheld / medium boxed / high power
ResultOccasional users pick the small one; monthly users pick medium / large · not verified on camera

Steps5 steps · click a frame to jump

  1. 1. Repairing power tools you can’t do without a spot welder; small / medium / large / extra-large

    Repairing power tools all the time you can’t avoid a spot welder; there is low power, high power, extra-high power; this one counts as medium.

    00:00 – 00:12
  2. 2. Small: occasional use, four or five cells, a hundred-odd yuan, switch on and weld, on and off as needed

    Low power suits people who don’t use one often and occasionally build two or three or four or five cells; a few times a month at most, buy the small type, a hundred-odd yuan; switch it on and click away, very handy, on and off as needed.

    00:12 – 00:40
  3. 3. Medium: open the box, take out the main unit, hook up the leads; high power: for people who build packs all the time

    The medium type means opening the box, taking out the main unit and hooking up the leads before welding, also handy, a bit more power; high power suits people who build their own Li-ion packs all the time, good fun too.

    00:40 – 01:06
  4. 4. Safety reminder: Li-ion in bulk, especially while charging, is risky; pick by how often you use it

    Watch safety with Li-ion, two or three cells don’t matter, in bulk it is a little risky, especially while charging; occasional use buy the small one, using it all month buy medium or high power, what suits you matters a lot.

    01:02 – 01:34
  5. 5. Owns all three, uses the small one most

    Has small, medium and large, but uses the small one by far the most, two or three times a month, sometimes not even once; grab it and go, handy.

    01:34 – 01:48

Bill of materials

AWithZ small handheld spot welder ×1A hundred-odd yuan, switch on and go · Occasional repairs
AWithZ medium-type spot welder ×1Boxed main unit with leads · Monthly use
AWithZ high-power spot welder ×1Building packs all the time

Creator’s tips

  • Pick by how often you use it: a few times a month, the small handheld; building packs all the time, medium / high power 00:12
  • The small one, on and off as needed, is the handiest and actually gets used the most 00:26

Li-ion safety

  • Li-ion in bulk is risky, especially while charging 01:06
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

“If you use it just a few times a month, buy this small type, a hundred-odd yuan, switch it on and you can click-click-click away” 00:12
“I use this small one by far the most, some months I don’t even use it once; grab it and go, handy” 01:34

Cost & time

Compact spot welder¥100 · Around ¥100

Comments 2· 1 real comments collected

.
...5 mo ago · Guangdong

Report comment. A lithium battery spot welder is very well suited to individuals or small repair shops. Or if you already have a high-power spot welder, buy a lithium one to use alongside it. AWithZ's lithium battery spot welders are at a very leading level in the industry, good materials, no cutting corners, welding stability and every aspect of the configuration are excellent. Compare them and you'll know, they leave the other brands on the market behind, and not by a little

.
...5 mo ago · Guangdong

Report comment. A lithium battery spot welder is very well suited to individuals or small repair shops. Or if you already have a high-power spot welder, buy a lithium one to use alongside it. AWithZ's lithium battery spot welders are at a very leading level in the industry, good materials, no cutting corners, welding stability and every aspect of the configuration are excellent. Compare them and you'll know, they leave the other brands on the market behind, and not by a little

.
...5 mo ago · Guangdong

Report comment. A lithium battery spot welder is very well suited to individuals or small repair shops. Or if you already have a high-power spot welder, buy a lithium one to use alongside it. AWithZ's lithium battery spot welders are at a very leading level in the industry, good materials, no cutting corners, welding stability and every aspect of the configuration are excellent. Compare them and you'll know, they leave the other brands on the market behind, and not by a little