Portable DIY 6 Gears Mini Spot Welding Machine for 18650 Lithium Battery Adjustable Spot Welder with Nickel Sheet Soldering Pen Welding Tool Kit  Feature:  Mainly used in the welding of nickel sheet of cylindrical battery, NI-MH battery, nickel cadmium battery like 18650 and etc.  Output gears indicator light(red), the number of indicator light corresponding the output gears.  Equipped with electricity indicator light(blue), different numbers to shows different electric quantity, 1 light(5-25%,flash<5%), 2 lights(25-50%), 3 lights(50-75%), 4 lights(75-100%).  6 gears of output power adjustable, welding more accurate. (the lowest level is 1 level, the highest level is 6 levels).  Automatic mode and manual mode adjustable, and there are two yellow indicator lights. In the manual mode, the right light is reversed, and the upper and lower automatic mode devices turn left.  Intelligent microcomputer control, over-discharge and over-charge protection, precise pulse control, support recharge, and simultaneous use.  Gold-plate terminal welding pen, with fine conductivity and low contact resistance, quickly detachment and easy carrying.  2mm thicken pure copper strip, supper-low internal resistance to increase overcurrent capability.  Built-in high-rate polymer power cell, the maximum output current is up to 650A, and it can continuously weld thousands of points after being fully charged.  Temperature control probe for temperature control protections, automatically shutoff when the temperature is higher than 60℃.    Specification:  Product Name: Portable Spot Welder  Battery type: Rechargeable polymer lithium battery  Battery capacity: 5000mAh large battery  Output voltage: 4.2V (MAX)  Output current 650A (MAX)  Input interface (Type-C charger)  Input parameters: 5V/2A  Product size: 160 * 94 * 25mm    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 1-2cm measuring deviation due to manual measurement.                        1 X Spot Welding Machine         2 X Welding Pen         1 X English Manual         1 X Type-C Cable         1 X File         1 X 2m Nickel Sheet