Description: Highly Adjustable and Powerful: The Battery Spot Welding Machine features 11 adjustable gears for control. It utilizes a two system for strong output, capable of welding 0.25mm plated materials, 0.2mm steel and iron, and 0.15mm pure with firm and smooth weld spots.Safe Features: This spot welder is designed with your safe in mind, featuring a built in quality safe chip, temperature control sensor, and two safe protection software and hardware to prevent accidents during use.Premium Construction and Compact Size: Made from sturdy ABS material that ensures long term durability while maintaining a compact size of 4.3cmx2.5cmx19.2cm for easy portability.Easy to Use: With gear position and power display, can choose automatic or manual mode, easy to use.Versatile Use: A portable spot welding machine is ideal for various applications such as cylindrical battery welding protection, mobile phone battery spot welding, battery spot welding, and DIY projects. Specification: Material: ABSEquipment Setting: 11 adjustable gearsSpot welding method: automatic/manual gearInput interface: Type CInput parameters: 5v/1A (MAX)Output V: 4.2V (MAX)Output current: 650A (MAX)Working temperature: -10~60CCharging temperature: 0-60 C Size Chart: 4.3cmx2.5cmx19.2cm/1.69inchx0.98inchx7.56inch Package Includes: 1 Handheld Welding Machine 1 Frosted Paper 1 Plated Sheet 1 Charging Cable Note: Please allow slightly errors due to manual measurement and different monitors.