SEESII Battery Spot Welder: Spot Welder for Lithium Batteries/18650, Mini Battery Welder with Built-in Rechargeable Battery, Spot Welding for 0.1-0.2mm Nickel Sheets/Iron/Stainless Steel Sheets (Amazon Affiliate)
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Samsung 35E 18650 3500mAh 8A Battery: https://www.18650batterystore.com/products/samsung-35e
MS WGO 12mm X 33m 108ft Heat Tape Heat Resistant Tape Heat Transfer Tape Thermal Tape High Temp Tape High Temperature Tape Heat Tape for Sublimation for Heat Press No Residue 1Roll (Amazon Affiliate)
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3M Scotch Super 33+ Electrical Tape – 3/4 in x 52 ft, Premium Grade All-Weather Vinyl, Resistant to Abrasion, Moisture, Corrosion, Alkalies – Black, 1 Roll (Amazon Affiliate)
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SEVENKA USB Powered Universal Battery Charger for Li-ion, NiMH and NiCad: https://youtu.be/6Gl10ioFoiM