For battery cells, review the product description for real-world current recommendations, testing notes, and application guidance. Manufacturer maximum ratings should be treated as limits, not the best target for long-term pack health.
Description
Portable battery-powered spot welding with precise multi-parameter control.
The AWithZ UK3 is a compact cordless spot welder for battery pack assembly and repair. Its color display and rotary control provide direct adjustment of welding power, preheat, pause time, trigger delay, and stitch count. Two included welding pens and a foot pedal give builders flexible control at the workbench or in the field.
Watch the UK3 real-world welding test
See the UK3 weld 0.20mm pure nickel, a copper and nickel-plated steel sandwich, and an intentional destructive limit demonstration using 0.30mm pure nickel at Gear 100.
Safety warning: The 0.30mm Gear 100 segment is an intentional limit test beyond the manufacturer-listed 0.20mm pure-nickel maximum. The setting punctured the test cell. Never begin at maximum power or repeat this test on a usable cell. Start low on scrap, increase gradually, and complete destructive peel testing before production.
Watch the AWithZ UK3 test on YouTube
Why builders choose the UK3
- 10,000mAh rechargeable internal lithium battery
- 99-level power adjustment with preheat, pause, trigger-time, and stitch controls
- Automatic, smart-pen manual, and foot-pedal operating modes
- WP110 and WP120 welding pens with replaceable copper electrode tips
- USB Type-C charging from a compatible 5V/2.4A power source
- Compact 100.5 × 158 × 48mm body with a multi-language color interface
Manufacturer-listed welding capability
| Material | Manufacturer-listed maximum |
|---|---|
| Pure copper strip | 0.1mm |
| Pure nickel strip | 0.2mm |
| Nickel-plated strip | 0.4mm |
| Steel / iron strip | 0.3mm |
Important: These are manufacturer-listed maximums, not guaranteed settings for every strip, cell, surface condition, or joint. Start on scrap at a low setting, increase gradually, keep the electrodes clean, apply consistent pressure, and confirm every setup with destructive peel testing before production work.
Technical specifications
| Model | AWithZ UK3 |
|---|---|
| Battery capacity | 10,000mAh rechargeable lithium battery |
| Charging input | 5V / 2.4A maximum, USB Type-C |
| Output voltage | 8.4V maximum |
| Manufacturer-stated peak output | 1,650A / 13.86kW maximum |
| Adjustment | 99 power levels |
| Operating modes | Automatic, manual smart pen, and foot pedal |
| Adjustable parameters | Preheat, pause, power level, trigger time, and stitch count |
| Dimensions | 100.5 × 158 × 48mm |
| Interface languages | English, Chinese, Japanese, German, French, Italian, Spanish, and Dutch |
Included in the box
- AWithZ UK3 spot welder
- WP110 welding pen
- WP120 welding pen
- Foot pedal
- Two spare electrode pins
- Nickel test strip
- USB Type-C charging cable
- Electrode cleaning paper
Safety and setup
Wear eye protection and work on a clean, dry, nonflammable surface. Keep the electrodes and workpiece free of oxidation and contamination. Avoid accidental short circuits, do not touch the tips or weld area immediately after operation, and keep the unit away from moisture and flammable materials. Do not disassemble or modify the internal lithium battery. Store and charge the welder in accordance with lithium-battery safety practices.
Download the AWithZ UK3 user manual (PDF)
Manual note: Some promotional images inside the PDF reference 0.25mm pure nickel, while the material chart lists 0.20mm maximum. DIY500AMP uses the stricter 0.20mm limit shown above. Start low, test on scrap, and verify weld quality before production.
Ships from Florida. Need help choosing the right spot welder? Contact support@diy500amp.com.
Orders ship from Florida when inventory is available. Lithium-ion cells require proper handling, protected packs, correct chargers, and safe storage. Do not solder directly to battery terminals.
Payment and Security
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Everything is great 100%recommended fast and
Everything is great 100%recommended fast and professional
Daniel Kammerdiener
One of my cell orders was short one cell
One of my cell orders was short one cell. When I went to send a text to the customer contact (this is rare and awesome way to reach out), the reply on a national holiday came within 15 min. That level of customer service is incredible, like family. I really appreciate that!
Joseph Krienert
Wow, these cells are great!
I purchased some of these tabless cells to try on my 1S 3" HD Toothpick drone build, and, albeit a bit heavy for 1S, it flies pretty well. Not a freestyle monster, but an endurance beast with decent send. These cells shrug off the demands of a BETAFPV Matrix HD AIO flight controller/12A ESC and some 1202.5 11000KV motors. I'm getting 15+ minutes of speedy flight time from a single cell trying not to go below 3.2V, and about 20+ minutes cruising. Love these cells and will definitely buy more when time comes, only from DIY500AMP, who are terrific!
VN in AZ
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