Specifications: Discover the power and precision of our portable battery spot welder, featuring a 4.2V output voltage and an impressive 800A output current. With support for 99 gears of power, this device offers both manual and automatic dual modes to suit your welding needs. The detachable soldering pin ensures easy and fast operation, making it ideal for both beginners and experienced users. Portable Design: Designed for convenience, this handheld spot welder is easy to carry, allowing you to bring it wherever your projects take you. It integrates a built-in power supply with the welding pen, eliminating the need for an external welding pen and providing seamless, hassle-free operation. Wide Application: Perfect for a variety of tasks, this spot welder is suitable for welding 26650 and 36650 cylindrical batteries, mobile phone batteries, and other electronic devices requiring battery repair or replacement. It's an essential tool for hobbyists and professionals working with electronic device batteries. Versatile Use: With its powerful 99 gears power output, this welder ensures precise and controllable welding across different materials and thicknesses. It is specifically designed to handle ni plating sheet welding from 0.10mm to 0.25mm thickness, making it versatile enough to meet diverse welding requirements with ease. Strong and Efficient: Engineered for performance, this battery welding machine features a dual pulse design with a strong output, ensuring firm welding and rounded solder joints. Enjoy seamless welding results that enhance work efficiency and quality, making this welder a reliable addition to your toolkit.