UK1 cordless portable spot welder, 9000W raging output! 1380A instant penetration. Click the knob, press the pen tip lightly, and the weld forms in an instant⚡
✅0.3mm nickel-plated / 0.15mm pure nickel / 0.1mm copper, all handled with ease
✅Dual grade-A power cells for steady runtime and long life
✅Smart spot-welding pen — even beginners weld like seasoned pros
DIY battery packs, repairs and mods, small-batch production — one unit does it all🛠️
#AWithZSpotWelder #CordlessSpotWelding #HardwareTools #DIYWonderTool
Say goodbye to the power cord! AWithZ UK1 cordless spot welder: precision welding / phone cell transplants / electronics repair / on-site repair / outdoor work. Turn the knob and get to work — weld wherever you go! #AWithZUK1 #CordlessSpotWelder #OnSiteRepairWonderTool #HardwareTools #GoodFinds
UF20B at gear 60 welding 0.05 copper: on iron it tears two holes out; on a cell negative it’s a bit weak; nickel strip as a base layer recommended
A follower reported that 0.2 copper stacked on 0.2 nickel-plated steel strip wouldn’t weld; the creator says he doesn’t recommend 0.2 copper (very demanding on the machine). With an AWithZ UF20B + upgraded No. 6 welding pen at gear 60 he runs a same-settings comparison: 0.05 copper strip welded to a rusty iron pipe and to the negative of a Jiashikai cell. The welds on iron are blackened (high current), and pulling tears two holes out of the iron; 0.05 copper stacked on 0.12 nickel-plated steel strip on the cell negative peels off leaving two holes, not torn apart. Conclusion: at the same gear 60 the result on iron is clearly much better; use nickel strip as a base layer before welding copper for a stronger joint.
Lefeng’s UF20B (No. 6 pen) gear test at 10/15/20/25 (preheat untouched): on 0.15 nickel-plated steel strip, gear 10 peels off leaving two holes, 15 takes effort, 20 tears the strip, 25 is completely OK and hurts the hand to peel — tearing achieved, no point going higher; answering a fan’s ‘0.15 copper + 0.2 nickel-plated won’t weld’ — first ask whether there is a nickel base layer, doesn’t recommend copper straight on with this unit (copper is hard), stacked-copper and non-upgraded-pen comparisons to follow; the test only speaks for the unit in his shop window
Opens: no addiction to fishing, but addicted to spot welding — a few days without welding and the hands itch. Today testing gears 10/15/20/25; the machine is an AWithZ UF20B with the upgraded No. 6 welding pen; last time was gears 1–5, this time from 10 up in steps of 5, preheat and the rest untouched, only the gear changes, two welds per gear. Gear 10: the 0.15 nickel-plated steel strip peels off, leaving two holes, two holes in the nickel strip too; gear 15: takes some effort, felt it in the hand muscles; gear 20: can already tear the nickel-plated steel strip; gear 25: completely OK, hand hurts from peeling, switch hands; the strip-tearing result is achieved, no need to go higher. A fan says 0.15 copper on 0.2 nickel-plated steel strip won’t weld — I asked whether there was a nickel base layer; with this unit I don’t recommend copper straight on, because copper is fairly hard; a stacked-copper test will be added to the series; the test only speaks for the AWithZ UF20B in my shop window, ones bought elsewhere perform differently, don’t flame me; this is the upgraded No. 6 pen, without the upgrade the result differs too, a non-upgraded-pen test to follow. 37 comments: quit food delivery and go work at a battery factory; why not get a better welder, it’s painful to watch (I also have an AWithZ P60F, it’s enough); can it weld EVE C40 (with a nickel adapter it can); will it work on Gotion copper-terminal 20A (probably not); is the low/high gear difference current or time; what current at the tip on gear 10; 6045 without stacked copper, straight 0.15 nickel-plated OK?; the No. 6 cable’s current doesn’t match a two-capacitor home-built unit.
Lefeng’s UF20B (No. 6 pen) gears 1–5 series test: preheat 0 / interval 0 / 1ms, 0.1–0.12 nickel-plated steel strip on a Jiashikai negative — gear 1 doesn’t stick at all, 2 sticks a little, 3 a bit tighter but still peels off, 4 a bit hard but still peels, 5 feels like it might stick a little; comments: use gears 10–12 for 21700; a welder costs a few hundred, just buy a new battery (creator: if you want cell performance, there’s no saving money)
Welder series: AWithZ UF20B with the upgraded No. 6 welding pen, trying gears 1–5; preheat 0, interval 0, (trigger) 1 millisecond; two rolls of nickel-plated steel strip, no idea which is 0.1 and which is 0.12, never mind; welding the 0.1 or 0.12 nickel-plated steel strip onto a Jiashikai negative. Gear 1 result: won’t hold; up a gear, gear 2: gear 1 didn’t stick at all, gear 2 sticks a little; gear 3: sticks a bit tighter again but still peels off; gear 4: a bit hard to peel but still comes off; today up to gear 5: this is the upgraded No. 6 pen, 0.1–0.12 thickness on a Jiashikai negative, gear 5 feels like it might stick a little; that’s the show. 11 comments: wanted to hand-build to save money, good grief, a welder costs a few hundred, just buy a new one (creator: if you want cell performance there’s really no saving money); gears 10–12 for 21700; try a 0.3; either go 4 capacitors or 133 mains-frequency; go do deliveries instead of this (no deliveries to do); is 36V at the port normal on a 48V pack when switched off.
Welds you can't tear apart! Don't be fooled by the small size! H1 handheld spot welder, straight out of the box onto 18650 cells: welds you can't tear off — beginners, buy with eyes closed! #AWithZSpotWelder #EquipmentReview #ElectronicsHobbyist #HardwareTools #WeldingWonderTool
17-second hardware-store sales pitch: weld batteries without asking anyone or using a soldering iron — a handheld rechargeable spot welder welds nickel strip onto cells really solidly, power / time adjustable, charges from a phone charger, really handy
Welding batteries — no need to ask anyone for help and no soldering iron; this is a handheld rechargeable spot welder that welds nickel strip onto cells, and the welds are really solid; welding power and welding time are both adjustable; a phone charger is enough to charge it, really handy to use. All comments are ‘share’.
Hardware store 18-second sales clip (same script as w113): weld batteries yourself without a soldering iron; the handheld rechargeable spot welder welds nickel strip onto cells / stainless steel and it holds really well; comments are all ‘shared’
Weld batteries yourself, no asking for help and no soldering iron; this is a handheld rechargeable spot welder that welds nickel strip onto cells and stainless steel, and it holds really well (no voice-over in the second half). Title: clear screen, simple operation, first-rate welds, a must for hardware-tool enthusiasts. All 9 comments are ‘shared’.
A palm-sized repair wonder! Before unboxing: what can this toy weld? After unboxing: easily welds 0.15 nickel-plated strip + 18650 cells #AWithZSpotWelder #EquipmentReview #ElectronicsHobbyist #HardwareTools #WeldingWonderTool
Pick it up in seconds! No learning needed! A spot welder you can use after one watch: power on – pick a gear – weld; even the all-thumbs crowd can make pro-grade welds! #AWithZSpotWelder #EquipmentReview #ElectronicsHobbyist #HardwareTools #WeldingWonderTool
Reuse button cells! The U3 Pro spot welder brings button cells back to life — eco-friendly and money-saving, small body, big energy! #AWithZSpotWelder #LiIonPackAssembly #HardwareTools #Welding #Tools
Ran into a problem? Have an idea for improvement? Tell us. We read every piece of feedback carefully. Valid feedback earns points, redeemable for accessories / coupons.
Thanks for your feedback!
We'll review it within 1–5 business days. If you left an email, valid feedback earns points redeemable for accessories / coupons. If we need to follow up, we'll contact you at the email you left.
WeldWorld is an open platform for user sharing; content does not represent official advice.
Improper battery handling can cause fire, explosion, chemical burns and serious injury. Read the full AWithZ Safety & Usage Guidelines before any lithium battery assembly, spot welding or testing, and before using the community.
Community content is personal experience, not verified by AWithZ; where it conflicts with official documents, the official documents prevail.
Never apply someone else's settings directly; always start at a low level and test on scrap.
Before copying any procedure, go through the self-check list in Part 3 of the guidelines.
LV5
UK1 Compact Portable WelderProductsAWithZ
LV5
