Features: brand new and high quality Lightweight and portable, stable and reliable, wear resistant and can provides long service times. Using 5MOS tubes, the maximum-current can reach 1700A; 5MOS tube positions are reserved on the back of the printed circuit board for DIY players to add their ownMOS tubes Suitable for welding 14650/17490/18650/21700/26650/32650 battery. High-power output design, 9 gear adjustable output power, more precise welding, suitable for continuous welding of thousands of points on nickel plates. With digital tube gear display function, 0-9 gears, 1st gear is the lowest, 9th gear is the highest, and the gears gradually increase. (8-9 gears are high-power gears, it is recommended to weld three times and stop for ten second, which can protect the life of the welding plate) Specifications: Material: Printed Circuit Board Working voltage: 6.5-16V Working current: