6-Gear Adjustable Mini Spot Welding Machine 7500mAh Charging Device Household Welding Machine with Type-C Interface OLED Screen for Lithium Battery Nickel Sheet Stainless Steel Sheet Made of aluminum alloy material and with fine workmanship, this spot welding machine features high wear resistance and long service life, mainly used for the welding of nickel sheets (0.1mm~0.3mm) and stainless steel sheets (0.1mm~0.25mm) of cylindrical battery, NI-MH battery, nickel cadmium battery and so on. Just have a try! Features: Made of selected aluminum alloy material, with surface anodizing treatment, featuring wear resistance and long service life. Integrated electric welding pen, gold-plated terminal & red copper pen holder & copper aluminum oxide welding pin, with fine conductivity and low contact resistance, quickly detachment and easy carrying. Thickened pure copper strip, supply low internal resistance to increase over-current capability. 6-gear of output power adjustable to achieve more accurate welding.  Output power indicators: light up the corresponding number of indicators according to the output gears. Electricity indicators: light up the corresponding number of indicators according to electric quantity.  Output mode modulation indicators: light up the corresponding indicator according to automatic / manual mode (adjustable). It can display internal temperature, charging state (when charging), remaining energy, welding power&gear and time interval on the OLED screen. In addition, when an exception occurs, corresponding text will appear, such as system exception, low power, temperature exception, etc. The temperature control probe for intelligent temperature control and safety conservation, it will automatically shut off when the temperature is higher than 60℃. Built-in 5V 7500mAh rechargeable high-rate polymer power lithium battery & Type-C interface, support full recharged within 3 hours through the equipped USB cable, and the maximum output current is up to 650A. With the USB interface, it can be used as a power supply to charge your mobile phone. Mainly used for the welding of nickel sheets (0.1mm~0.3mm) and stainless steel sheets (0.1mm~0.25mm) of cylindrical battery, NI-MH battery, nickel cadmium battery and so on. Specifications: Material: Aluminium alloy Color: Black Power Supply: 5V 7500mAh rechargeable lithium battery Display: OLED screen Interface: Type-C interface Input: 5V / 2.1A Output Voltage: 4.2V (MAX.) Output Current: 650A (MAX.) Design Current: 1000A (MAX.) Gear: 1~6 gears adjustable Recommended Thickness of Nickel Strip: 0.1mm~0.3mm Recommended Thickness of Stainless Steel Sheet: 0.1mm~0.25mm Package Size: Approx. 250*150*50mm / 9.84*5.91*1.97in Package Weight: Approx. 820g / 28.92oz Packing List: 1 * Spot Welding Machine 2 * Spot Welding Pen 1 * Type-C Cable 1 * File 1 * Nickel Strip 1 * User Manual (English)