A neat trick for welding Li-ion cells

A repairman's 31-second revelation: after decades of soldering 18650s with an iron, only today did he learn there's a handheld spot welder, far better than a soldering iron; press down, fire, give it a tug and it's rock solid (screen shows gear 90)

Appliance repairer Xiao Yi: soldered 18650 cells with a soldering iron for decades, and only today learned there's a handheld spot welder, much better than a soldering iron; here's a test for everyone; press down, spot weld; done, give it a tug, very solid. Comments are all asking the price; someone says it runs out of charge after a few welds; requests for a full-length video.

Outcome

Steps3 steps · click a frame to jump

1. 
   1. Decades with a soldering iron; only today learned of handheld spot welders

   Soldered 18650 cells with an iron for decades; only today learned there's a handheld spot welder, much better than an iron; let's test it.

   00:00 – 00:12
2. 
   2. Press down and weld

   See if it works; press down; spot weld.

   00:14 – 00:23
3. 
   3. Very solid

   Done; give it a tug — very solid.

   00:27 – 00:31

Bill of materials

Creator’s tips

• For 18650s a spot welder beats a soldering iron; press down, then fire 00:00

Pitfalls

• Comment: runs out of charge after a few welds (doubtful)

Li-ion safety

Quotes