Suitable for 14650, 17490, 18650, 21700, 26650, 32650 and other cylindrical lithium batteries, metal hydride batteries, etc., all of which can be firmly spot welded. Support 0.1-0.3mm sheet spot welding. Two-sided outgoing wires are convenient for spot welding, and the are marked, so it is not easy to make mistakes. 99 levels of power adjustment Digital tube real-time gear display, gears 0-99, 1st gear is the lowest, 99 gears is the highest When using, increase the gears in turn. The spot welding machine control board uses 5 MOS tubes, and after 5 parallel connections, the theoretical maximum current can reach about 1700A. 8 square spot welding pen, 10AWG wire, aluminum oxide copper spot welding needle, the over-current capacity and durability, and greatly the spot welding efficiency. Product name: K99 spot welding machine Working voltage: 6.5V-16V Working current: Less than 20ma Standby power consumption: Less than 0.5ma Recommended operating temperature: -10-60C Voltage: 12V Welding current: 1700A MAX Welding sheet thickness: 0.1-0.3mm (related to battery discharge energy) Capacity: 20AH-80AH (new battery does not the capacity of 45AH, over 45AH, please contact customer service to inquire about the current limiting ) or: 4-5 strings of super capacitors : Do not use switching power supplies, , chargers, water batteries, and charging for power supply! color:Purple Material:PCB size:90 x 60mm Package Contents: 1 x Control Panel 1 x Sheet 2 x Spot Welding Pen 2 x Connection Cable 2 x Heat Shrinkable Sleeve 3 x Caps 4 x Screw 4 x Nuts Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.