This product has good electrical conductivity, strong torque resistance, low contact resistance, and safe use. The mini portable design is easy to carry. The Spot Welder is small but full-featured to meet your battery pack building needs. Built-in 5000mAh rechargeable polymer lithium battery and Type-C charging cable, this product can be fully quickly within 3 hours. 2.4A fast charge can also be used as a power bank to charge your phone. The product is very convenient to carry. Our mini spot welder is equipped with a visible color LCD screen, so you can clearly see the remaining battery, delay time, temperature and the gear of the spot welder. It increase your productivity. This DIY spot welder is mainly used for welding nickel sheets of cylindrical batteries, nickel-hydrogen batteries, nickel-cadmium batteries (such as 18650). Support 0.1-0.25mm nickel sheet spot welding, fully state, support 0.25mm nickel sheet welding, with it, save time and effort. Voltage: 4.2±0.05V Battery capacity: 5000mAh Welding current: 6-1200A Full charging time: 2-3 hours Standby current: 20uA Charging: 5.2V2.1A Discharge: 5V24A max(try to avoid running out of power to extend battery life) Colour:White Material:ABS Package Contents: 1 x Welding Machine 2 x Welding Pen 1 x Nickel Sheet 1 x Type-C Cable 1 x barley paper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.