# 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.

- [Original product page](https://bargainpostbox.co.uk/product/awithz-uf20b-uk-battery-spot-welder)
- [View offer](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: AWithZ
- Model: UF20B-UK
- Price: 106.84 GBP
- Previous price: 135.99 GBP
- Discount: 21%
- Price checked: 2026-11-12T17:59:56.893Z
- Rating: 4.3 / 5
- Reviews: 13

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## 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.

## 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.

## 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

## Before you buy

- 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.

## In the box

- Spot welder (Included)
- Power adapter (Included)
- Welding needle (Included)
- Spot welding pen (Included)
- Nickel-plated sheet, length=5m thickness=0.15mm (Included)
- Foot pedal (Included): Listed cable length is incomplete.
- 18650 bracket (Included)
- Metal file (Included)
- User manual (Included)

## 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.

## Customer feedback

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.

## Alternative options

- [Spot Welder,AWithZ 14.6KW Battery Welder with Farad Capacitor,Supports Auto& Panel Modes, 999 Welding Level,Supports Welding Copper/Pure Nickel/Nickel-Coated Sheets,for Battery Pack Building](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [AWithZ Portable Battery Spot Welder Kit UK3, 10000mAh Battery Spot Welding Machine with 1650A,Dual Pulse, 1–100 Gear Control, Foot Pedalfor 18650 Battery Pack Repair](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [SEESII Battery Spot Welder: Handheld Spot Welding Machine, Built-in Rechargeable Battery, Mini Battery Welder Supports 0.2mm Nickel-Plated Sheets, Ideal for Battery Pack Assembly and Repair](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [AWithZ Battery Spot Welder H1-D, 11 Gear Adjustable Double-Ended Replaceable Pen Tip Spot Welder, Automatic and Manual Modes, Welding Plated Nickel Sheets for DIY 18650 Battery](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [11500W Battery Spot Welder, Awgem 0.1-0.3mm Portable Spot Welder with Rotary Knob 100 Gears, Auto/Foot Pedal Modes, Dual-Pulse Spot Welder for Lithium Battery Repair and Welding](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [Electric Spot Welder, 220V Double Side Spot Welding Machine for Efficient Mild Steel Sheet Metal Repair](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [AWithZ Portable Battery Spot Welder UK1, 2 X Reinforced,11500W,1380A High Output Current with100-Level, Auto/Foot Pedal Control,for 18650 21700 Battery Pack Repair](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [Awgem Battery Spot Welder, Upgraded Handheld Mini Portable Spot Welder for 18650 Battery, Welding Nickel-Plated Sheets 0.2mm, Iron,Stainless Steel Sheets, 99 Gear,Auto and Manual Mode](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [Spot Welder, Kerpu 12000mAh Battery Spot Welder, 2'' LCD Screen Upgraded Enhanced 199 Gears Adjustable Portable Mini Spot Welder with Nickel Sheet & 4X4 Holder for Making Battery Packs \(Black\)](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [SEESII Capacitive Battery Spot Welder, Max 10kW, Up to 0.2mm Pure Nickel \| 12V Power Supply Available, Low Internal Resistance, Overvoltage Protection, for Battery Packs DIY & Repair](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [Awgem Compact Handheld Spot Welder, Auto/Manual Mode with 11 Gears for Mobile Phone & Bluetooth Battery 18650 Battery Welding, Aluminum Alloy Shell Battery Spot Welder](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [SEESII Portable Battery Spot Welder with Display for Battery Pack Building \| Portable Welding Pen Cover, 3360W Max Power, Customizable Welding Settings, Copper Tips, Suitable for Outdoor Work](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)

## Add-ons

- [Ctyjia 18650 Lithium Battery Insulator Rings 200 Pcs Hollow Rings + 200 PCS Solid Rings, Battery Insulating Adhesive Paper, Battery Insulation Gasket](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)
- [KUOQIY 6 PCS 3 Meters Nickel Plated Steel Strip, 0.1 \* 6 mm Battery Nickel Strip, Soldering Tab Nickel Strip, for Battery Spot Welding](https://bargainpostbox.co.uk/visit/awithz-uf20b-uk-battery-spot-welder)

## Images

![AWithZ UF20B-UK Battery Spot Welder, 10.5KW — 1](https://bargainpostbox.co.uk/i/SgXn1YLD78uj154SfICIzGsFLYge89JJ6pgj0Gj4wQSUUIpPjIaimYJeLx4lJyJ_l_ut8PMxUAgPFYq7MyqojAi_urn_eaKQ3Ev5u0BDnPIQTk75vytxWeG1.jpg)

![AWithZ UF20B-UK Battery Spot Welder, 10.5KW — 2](https://bargainpostbox.co.uk/i/-3SAcRHLl0tpXekXJqxR5xQvRVpiX8ZduUwdWkoQ7oyViSB2iDhc9zvPvTgMo-EApvOJcPsDyH01l78VNYWaVXuZrPfJh2fsoksj2Y1-z-BAqm3s0-lrOKd1.jpg)

![AWithZ UF20B-UK Battery Spot Welder, 10.5KW — 3](https://bargainpostbox.co.uk/i/PaYG92X7D1Ate70DOjntOKA1ir4NGuy8MapY7H6xL-h2sDu5ojEIfWXFCHjiXyo9lyV2cUR0xslR4oflT1rKxh5FS_eUdzf4eA7iFsbRJjuOgUFYxDOwCd8f.jpg)

![AWithZ UF20B-UK Battery Spot Welder, 10.5KW — 4](https://bargainpostbox.co.uk/i/rfcI79ykEXc2i_JuHJIhkIGyUpW2NvIdAFhDoI4t6qrNJBrl-4ozWW689sJWWr8or7CQ9fO4xwFXhj2r-f8HBrg0TTuBYZ9V5i8G8CNBc48u8AmBB8P48h5Y.jpg)

![AWithZ UF20B-UK Battery Spot Welder, 10.5KW — 5](https://bargainpostbox.co.uk/i/gZLo0if8xn7_aJjLlniNm8UH95tCXlmz8e8sB8wLuPeNHZQ37YzhhFWwAZqUScRWetiVKtkSU7WQj-YwOuphk_4pdAmWIl5EX1Ei-CzfSksJeuxLsNuqy0sc.jpg)

![AWithZ UF20B-UK Battery Spot Welder, 10.5KW — 6](https://bargainpostbox.co.uk/i/p0I7qoeDTfb3IfQZkEHyUW8dnvuuCzbLdrdj2WUZXgao-ooJDBwF-6PF0O6H5ex3BrmGTdo5-wp3oteJ2Fj5QGctiTcejJJp7sTDJBoNAx57nKDhpPoH4fi_.jpg)

![AWithZ UF20B-UK Battery Spot Welder, 10.5KW — 7](https://bargainpostbox.co.uk/i/CSv5J-WfVMacYw23-yqQaU2PFjuHwGuzfSRdEwPXWn0JfCY5KQpglmmhWedpwsPCSVh0l_5-chgWKx0AUmammbZo4NRVzwqWpUSmLEULQ9M6DLwrxio9ODDV.jpg)