Portable 12V DIY PCB Circuit Board Spot Welding Machine for 18650 26650 32650 Battery Spot Welder with Nickel Sheet Soldering Pen Welding Tool Kit Specification: -Can be welded 18650/26650/32650 lithium battery, portable, stable and reliable. -System voltage: 12V-14.6V. -Working current: 90-150A. -Packing size: 19 * 10 * 3cm. -Recommended battery: 1. 20-45Ah lead-acid battery, good performance, low internal resistance 2. 3.5-5.5Ah 45C 3S aviation model lithium battery pack 3. 30-35Ah capacity 18650 battery pack -The circuit with a 12V battery will become an energy storage spot welder for welding nickel sheets (such as lithium batteries and nickel-chromium batteries). According to different configurations, the thickness can be about 0.1mm-0.15mm. Function Description: After powering on, press and hold the switch for 2 seconds to turn on the power There are 4 modes, press and hold the switch for 3 seconds to switch to the "beep" sound and complete Level 1: Low power consumption, green light flashes once 2nd gear: medium power, green light flashes twice Level 3: High power, green light flashes 3 times 4th gear: automatic mode When the red light is always on, press and hold the switch to turn off the device. Principle: As shown in the figure, a high-speed protection system is built in the microcontroller. When the welding current is too large, the ultra-high-speed comparator will instantly turn off the output as shown by the red arrow to achieve the purpose of protecting the welding machine. Under normal circumstances, this function module will not trigger Once the protection is triggered, lift the pen to automatically release the protection Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-3cm measuring deviation due to manual measurement. 1 X Circuit Board 4 X Copper Noses 4 X Screws 1 X Buzzer 1roll X 1m Nickel Sheet 1 X Capacitor 2 X Soldering Pens 2 X Input Wires 2 X Heat Shrink Tubing