AWithZ UF20B-UK Battery Spot Welder, 10.5KW

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Product guide

AWithZ UF20B-UK Battery Spot Welder, 10.5KW

The AWithZ UF20B-UK battery spot welder is a mains-powered capacitor unit for battery-pack assembly and repair. It offers adjustable welding settings and several trigger modes, but it must remain plugged in during use and its stated output and material capabilities are manufacturer claims.

At a glance

Capacitor-based design is described for building and repairing battery packs, including 18650 formats.
Offers pen-control, automatic and foot-pedal operation, with adjustable output settings.
The listing says to keep the power supply connected because the capacitor does not store power for normal operation.
Temperature monitoring and automatic disabling of welding during an abnormal temperature condition are claimed.

Price

£106.84Save 21%

Reference price: ~~£135.99~~

Price checked: 12 Nov 2026

View offer

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Pros and cons

Pros

Three stated trigger options allow use by pen control, automatic operation or foot pedal.
The adjustable output settings provide more control than a single fixed setting.
The listing describes temperature monitoring and a welding shut-off response if temperature is abnormal.

Cons

It must remain connected to mains power during use, so it is not a cordless spot welder.
The listing warns that copper welding may require flux or an added medium, and says gold and silver cannot be spot welded.

Technical specifications

10 specifications

Identity
Brand	AWithZ
Model	UF20B-UK
Colour	Black(upgraded Version)

Power and battery
Power configuration	ac
Batteries included	No

Dimensions and installation
Package dimensions	20.6 x 20.4 x 10.2 cm; 1.88 kg
Weight listed	1.88 kg

Claimed welding features
Maximum output power	10.5KW
Welding output adjustment	0-99 level welding output adjustment
Operating modes	1. Intelligent spot welding pen control, 2.Auto mode,3.Foot pedal mode

What to know before buying

Listing details to confirm

Keep the unit plugged in while working. The listing says the capacitor cannot store electricity and recommends practising on scrap material before working on usable cells. It also warns of sparks and recommends goggles. The listed 10.5KW output and material claims are manufacturer statements, not independent measurements.

What’s in the box

Included

Spot welder
Power adapter
Welding needle
Spot welding pen
Nickel-plated sheet, length=5m thickness=0.15mm
Foot pedal
18650 bracket
Metal file
User manual

Who is it for?

A good fit for

DIY battery-pack builders seeking a mains-powered spot welder with adjustable settings and foot-pedal or pen control.
Repair work involving battery packs and nickel or nickel-plated strips, subject to suitable material thickness and setup.

Less suited to

Buyers who need cordless operation or a unit that can continue welding after being unplugged.
Work requiring confirmed gold or silver welding, or copper welding without flux or an added medium.

AWithZ UF20B-UK Battery Spot Welder, 10.5KW · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 13 ratings

5 stars58%58%
4 stars32%32%
3 stars0%0%
2 stars0%0%
1 star10%10%

The supplied evidence contains aggregate ratings but no customer-comment summary, so it does not establish what buyers praised or criticised. The rating pattern is mostly positive but includes a smaller one-star portion, and the small sample cannot explain the reasons behind either response. Buyers should assess the unit against their needs, especially its mains-only operation and adjustable controls.

Frequently asked questions

Does the UF20B-UK work without being plugged in?

No. The listing says the capacitor does not store electricity and the power supply should stay connected during use.

What operating modes are listed?

The listing describes spot-welding pen control, automatic mode and foot-pedal mode.

Can it weld copper?

The listing says copper welding is possible with flux or an added medium. It says gold and silver materials cannot be spot welded.

What should I know before welding battery cells?

The listing recommends practising on scrap material first, pressing the material firmly against the battery and wearing goggles because sparks may occur.