18650 battery spot welding pen Performance parameters: Shell material: modified high temperature engineering plastics Welding needle material: imported alumina copper welding needle Fastening method: wire cold pressing Wire specifications: 10AWG 40CM Welding needle specifications: 3MM main body, 1.5MM concentric needle Instant overcurrent: 500A Welding thickness: ≤0.3MM nickel sheet Standard solder pins can be replaced