8000MA Mini Portable Spot Welder 3.7-4.2V Lithium Battery Automatic Spot Welding Control Circuit Board DIY Welding Tool Kit        Feature:  1. Using high-quality materials, the quality is guaranteed 2. Powerful and easy spot welding of 0.1-0, 15 nickel pieces 3. Spot welding pen short circuit protection, double copper bars increase overcurrent 4. Six-to-one gear switching, six-color light display 5.Type-c charging, intelligent power detection Specifications:  Type-c charging port input Voltage: 5V Current: 1-2A Can't use fast charge Description:  The control board is equipped with 3.7-4.2V 800OMA power lithium battery; the discharge rate is up to 65C; the output capacity of about 300A is output through the MOS tube, and the energy will be concentrated at the end of the welding pen, and the nickel sheet will be firmly connected to the end of the welding pen by short-circuit heating. Batteries are fused together. Complete in milliseconds. It is precisely controlled by the single-chip microcomputer program, and no trigger switch is required to realize automatic spot welding easily and efficiently. Package Included:  Spot Welder *1 Soldering pen (10AWG wire)*2 Type-c charging cable*1