I thought I'd do a quick demonstration while I'm using my spot welder at the moment to make up a 10s4p li-ion battery pack. **Nickel Strips** http://amzn.to/2j8HQvo http://amzn.to/2jBqHhV https://www.ebay.co.uk/itm/Solid-Pure-Nickel-Strap-Strip-Spot-Weld