> FYI the device you're talking about is called a "capacitive discharge > resistance welder". IIRC spot welders are completely different devices. Either way, you need to make electrical contact to both sides of the weld, and I am wondering how you plan to do that with the batteries already made. I assumed that batteries supplied with the tabs had them welded on before assembly of the battery internals. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist