Yes it works and no sparks
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Good luck
Welding pen for the win
Mat inside is only for tests 
. I always put the mat or gum outside the pack, this is first time when it goes inside. I will check how the battery will heat.
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It’s something like Eleksmaker clone, with 5W diode laser
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need thicccer wire I think
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10awg is all I got, it’s only like 15" long…I’ll do some tests in a minute when the glue dries. Adding some hot glue so I can hold it with one hand
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uhm that glue will melt… lol them puppies gonna get hawt
add some kinda spacer in-between like a piece of wood, and shrink over both
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Science man, I’m kinda curious
Worse case I get some bigger wire and make new ones of these
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make sure the GoPro is rolling, wanna see them leads get glued to your hands 
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Ta-da! I love how the wires freak out, should I bind them together?
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Lmao you know it’s a lot of current when the wires jump
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Those wires are gonna get toasty pretty quick
7 consecutive welds and it was pretty cool still, the cells are way hotter than the electrodes
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Help…? The welds are either too weak to stick or the nickel gets a hole blown through, any ideas at all?
Sunkko 709a, salvaged ncr18650ga cells (ground surfaces), 8x0.15 nickel
Can you widen the tips at all? Might help to increase the surface area of the weld.
Kweld and malectrics use huge diameter electrodes comparatively.
Hmm, just a file to the electrodes?
Push harder. Blowouts are usually due to poor contact between the electrode-nickel-cell sandwich, which can be solved by pressing harder.
Blowouts on one side only are due to uneven pressure between the two contact points.
Don’t dull the electrodes too much, you need the high power density to get the proper localized heating required to melt the layers together. If anything I’d recommend sharpening.
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Salvaged cells require a high expertise to weld. Mostly on negative side. They lack metal so you can easily pierce the can using the proper pulse.
Look each cell and try to weld on the parts not sanded with the usual power. Go slowly, dont rush it.
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