Specifications: Maximum output current up to 1200 A Fully charged, it can be welded continuously more than 1000 times Five power levels adjustable, short button press control, blue light display Charging port: charging via USB plug Charging voltage: 5V input (higher voltage input is strictly prohibited) Charging current: 1A (5V/2A charger recommended) This product supports charging while using, the remaining power indicator: green (high), flashing green (high), flashing red (low), flashing red (low), the red light is on, needs to be charged to work. Low power affects the welding effect Instructions for changing Short press to switch on Long press to shut down 6 minutes without operation will automatically shut down Notice Copper and aluminum surfaces cannot be welded, rusty surfaces cannot be welded, smooth stainless steel surfaces can be welded normally. Part of the battery is stainless steel electrode, aluminum electrode, our spot welder can weld stainless steel electrodes, aluminum electrodes need ultrasonic welding, please note. Remember again that aluminum electrodes and copper electrodes cannot be welded. Common 18650, 32650 and other round batteries can be welded. The two needles are pressed evenly on the nickel piece before initial welding, lifted and welded next time. Instructions for use Spot welding of nickel sheet 1. The battery should be fully charged, must be fully charged, spot welding nickel sheet, the thickness cannot be thicker than 0.12mm. 2. Pay attention to the pressure when spot welding. The harder you press, the less heat produced; The lighter you press, the greater the heat. but too light will perforate, too heavy and the tip will not be tight. So you need the right strength, don't press too hard. 3. The battery should be polished smoothly, remove the surface of the oxide layer and be uneven. If the soldering pin is oxidized, please use fine, smoothly polished sandpaper. 4. Use the sharpest tip of the pen so you can point firmly. Welding method: Visualize the welding tip and the horizontal plane into a 60 grip, two needles pressed into the nickel surface pressure at the same time, good contact, current flow from one needle to the other needle, high current melt nickel, so that battery success and nickel welding. Characteristics: 1.5-way power adjustable, five-stage power display. Simple and convenient, powerful 2.5V charging, more convenient to use 3. Spot welder sends nickel belt, one-handed, convenient to use 4. Charging indicator, buzzer alarm, safer 5. Supports nickel pieces with a thickness of 0.1-0.12mm, intelligent identification, automatic welding, simple and convenient operation Scope of delivery: 1 x Spot Welder 1 x Nickel Strip 1 x USB Charging Cable