Can be used for welding lithium batteries such as 18650/26650/32650, with ease for welding common 0.1mm~0.15mm nickel plated sheets There are 5 gears in total, from 1st to 5th, where the spot welding strength gradually strengthens. The 5th gear is the strongest, and it is effortless for welding common 0.1mm~0.15mm nickel plated sheets. The 1-button function switches between 1st power -2nd power -3rd power -4th power -5th power every 3 seconds, and the buzzer briefly sounds once per spot welding output. The indicator light flashes green once Spot welding uses the principle of rapid local heating and cooling with high current, requiring sufficient current supply. Generally, when welding 0.1-0.15 nickel plated sheets, the current is about 90-150A, so the working power supply of the circuit board must be or equal to 150A Color: As Shown Material: PCB Package Contents: 1 x Spot Welder DIY Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.