After the failure of my $16 battery tab spot welder, I saw Kevin Dark’s DIY version.
But it wasn’t exactly what I needed, so I decided to build a modified version.
The Modified Dark Welder, or Dark Welder 2.0, has a foot switch that triggers a precise welding current pulse that is always the same length of time – no matter how long you hold down the button.
And in my new version, the button is now a foot pedal to keep your hands free.
The best part is: IT WORKS!
I’ve been looking for a cheap battery tab spot welder for 18650 lithium-ion cells for awhile now.
The usual ones just aren’t worth the cost. For example, for half the cost of a welder, I could buy at least 2 brand new power tool battery packs.
Enter the $16.99 Portable Mini Spot Welder!
At that price, it was worth a shot…