DIY Spotwelder Accessory Pure Copper Handheld Spot Welding Pen without Needle for 18650 Battery

Features:
Use this circuit board to works with a 12V battery can makes it become anenergy storage spot welding tol for welding nickel pieces such as lithiumbatteries and nickel-chromium batteries.
And the welding thickness is range from 0.1mm to 0.15mm according todifferent configuration, for welding 18650/26650/32650, etc.
Equipped with one mode swtich key, which can switch modes, each modecorresponds to different welding time.
LED corresponds to red / green / blue / white / yellow / pink / purple, 7modes, the shortest time is red led and the longest time is purple.
Long time press to set the waiting time, the default is 3 seconds and themaximum can be set to 10 seconds.
Powersupply voltage: 7V-16.8V ( capacity X rate = must be greater than 150A )
Current requirements: 150A or more instantaneous output (such as car starterpowersupply, 3S RC high-power battery pack, 20A leadacid battery with fineperformance above 20A)
Lightweight and portable, stable and reliable, wear resistant and can provideslong service time.