Spot welding 1.5V battery tabs

I'm trying to spot weld battery tabs for rebuilding a Nicad battery.  I'm using a 12 volt SLA battery for power.  When I touch the leads they get so hot they burn the tabs, but the weld doesn't penetrate the battery.  What am I doing wrong?

NachoMahma7 years ago
.  You need to put pressure on the weld while welding. See second sentence.
Look at the first link in Lemonies Google search, everything you need to know is in there.
lemonie7 years ago
You need special kit for this, don't ask what you're doing wrong, rather find out how to do it right: