Unboxing and testing a small handheld spot welder — very practical and handy

Unboxing a ¥100-class handheld spot welder: 11 gears, manual / auto, Type-C charging; on gear 8 auto, welds on both 18650 and coin cells can’t be torn off, recommended for home use

Unboxing a ¥100-class mini handheld spot welder: in the box are the welding pen, a charging cable, a sheet of sandpaper and a pack of nickel strip. The body has 11 gears, a manual / auto indicator and a battery indicator; long-press to power on, button to change gear, long-press to switch mode; Type-C charging, arrived fully charged. Tested on an 18650 and a coin cell (which a soldering iron basically can’t solder): gear 8 auto mode, two welds first, then six, pulled and torn and they won’t come off — the strip tears instead; welds on the coin cell are round and solid. Verdict: for the modest volume of home use, worth recommending. In the comments the creator replies the strip thickness it can weld is 0.2; a top comment questions the built-in battery’s lifespan, saying a supercapacitor model would be better.

Outcome

Steps5 steps · click a frame to jump

1. 
   1. Unboxing: welding pen, charging cable, sandpaper, nickel strip

   A ¥100-class handheld spot welder, said to work one-handed; in the box a welding pen, one charging cable, one sheet of sandpaper, one pack of nickel strip.

   00:00 – 00:15
2. 
   2. Body: 11 gears, manual / auto light, battery light, Type-C

   Very compact; 11 gears; manual / auto indicator; battery indicator; long-press to power on, button to change gear, long-press to switch mode; Type-C charging, battery full.

   00:15 – 00:40
3. 
   3. Gear 8 auto on an 18650: two welds and it holds

   An 18650 and a coin cell ready — these basically can’t be soldered with an iron; gear 8 auto mode on the 18650, two welds and it’s on, can’t pull it off.

   00:40 – 01:00
4. 
   4. Six welds, then tear: strip rips, welds hold

   Same gear, six welds, won’t pull off; tear at it with pliers and the strip rips — very solid.

   01:00 – 01:21
5. 
   5. Weld the coin cell, verdict — recommended

   Welds on the coin cell are round and solid, the strip tears again; for the modest volume of home use it does the job, worth recommending.

   01:21 – 01:37

Bill of materials

Measured on camera

Creator’s tips

• 18650 and coin cells basically can’t be soldered with an iron; two spot welds and they hold 00:45

Li-ion safety

Quotes

Cost & time