Intelligent Logic Control Chip: This spot welder control board is equipped with an intelligent logic control chip that efficiently calculates battery power, preventing tube blowing and ensuring smooth operation. This advanced feature enhances the reliability and longevity of your welding projects. Four Way LED Display: The control board features a four-way LED display that integrates essential functions such as capacity, multiplier, gear, and power warning. This comprehensive display provides real-time information, allowing you to monitor and adjust settings with ease for optimal performance. Support for Welding 0.1‑0.3mm Nickel Chip: Designed to handle a range of welding tasks, this PCB circuit board supports welding 0.1‑0.3mm nickel sheets. With six adjustable welding gears and a welding current range of 100A‑900A, it offers versatility and precision for various DIY projects. Compatible with Multiple Battery Types: This spot welder circuit board is versatile and suitable for spot welding a variety of battery types, including 18650, 26650, 32650 cylindrical lithium batteries, as well as NiMH and cadmium nickel batteries. This compatibility makes it an essential tool for battery pack assembly and repair. Commonly Used Power Supply: The control board is designed to work with commonly used power supplies, including model batteries, car starter batteries, and high-rate lithium batteries. This flexibility ensures that you can easily integrate it into your existing setup without the need for specialized equipment. Enhance your DIY battery welding projects with this versatile and intelligent spot welder pen PCB circuit board, designed for efficiency, precision, and compatibility with a wide range of battery types.