18 x Samsung INR18650: Gearbest LINK
18 x Samsung INR18650: Banggood LINK
18 x Samsung INR18650: Ebay LINK
6S BMS module: LINK eBay
Nickel strip 0.15x8mm: LINK eBay
2 x lipo wire: LINK eBay
Spot welder: Banggood LINK
Wire, soldering iron, solder, etc...