Help: the area around the weld turns black, with a ring of burn marks too. Is the gear too high, or was the nickel strip not pressed flat? 0.15 nickel-plated on the H1, I'm using gear 45. It tears off when I give it a pull, so I don't feel good about putting it in a pack. Could any old hands point me in the right direction? Thanks!

How should I set it for 0.2 copper stacked with 0.12 nickel? My UF20B is at gear 80 and it still won't hold — not a single mark on the copper side. Do I need to add flux first?

The next Parameters table will be prioritized by vote count. After voting, tell us in the comments which combo you'd most like to see (material × thickness).

Maybe a dumb question: when welding nickel strip on the negative side of a cell, do you need to go two gears higher than on the positive side? I see the pros setting it that way in videos, but nobody says why.

7.4V battery for a small fan, two 18650s in series, but after welding it only reads 3.7V. Did I put the nickel strip in the wrong place? I'll add pics tomorrow, just asking first whether this is a common mistake... feeling a bit down.

(Prototype sample, data not real)

This hand-built Li-ion one is decent, which platform did you buy it on

Why does it jam?

Report comment. Tear it down and show us

So how do you check the battery percentage?

Can I get you to make me a custom one?

Does vertical vs horizontal layout affect current-carrying capacity

Did you build the welder yourself

I just want to ask, which courier do your fans ship with?

Is there a link for the spot welder

What voltage did you weld at?

Roughly how much to build a 48V 30A, boss?

Are you in Shenyang?

Recommend a multimeter

Where's the next episode

How do you use it

How much is one of these cells????

How much to re-cell this?

Is 15Ah enough to get work done?

Where’s the address? Not telling?

Which soldering iron is that? Looks really handy.

How much is this welder of yours?

No need for a mould?

So with this thing, if I just power it from a high-power charger, can it convert current and voltage to work as a universal charger?

Post your address,

Is it open source?

What if the code throws errors

Quick question, bro, how did you get it out? I'm planning to swap the battery too

Why not use a Panasonic cell?

I just want to ask, can batteries be mailed

Are four cells ¥20 each?

What spot welder

No protection board?

How much is the spot welder?

Can it weld Jiashikai