All you need is a hand held welder and an old 12v car or truck battery. Just follow these simple instructions. You can use a flat head screw driver to hold down the strip while welding, something I was not able to show holding the camera. Also, use a heavy gauge wire from the battery to the welder, not more than a few meters. If the wire gets really hot, shorten it or use heavier gauge. Good luck! 🤞 LITHIUM ION BATTERIES WELDING