1、SAFE AND PORTABLE: Spot welding machine has good electrical conductivity, strong torsion resistance, low contact resistance and safe to use. Mini portable design, easy to carry. Small but feature packed to meet your various battery pack building needs 2、SUPPORT 0.1‑0.25MM NICKEL SHEET: In the fully charged state, the rechargeable mini spot welder support 0.25mm nickel sheet welding, saving time and trouble 3、APPLICABLE SCENARIO: DIY spot welding machine is mainly used for nickel sheet welding of cylindrical battery, nickel metal hydride battery, nickel battery(such as 18650) 4、POWER SUPPLY INFORMATION: The mini spot welder has a 5000mAh rechargeable polymer lithium battery and a Type C charging cable, which can be quickly fully charged in 3 hours. 4A fast charge can also be used as a mobile power to charge the mobile phone, one machine for dual use. Low power consumption, standby for one year. With low power protection, no power automatic shutdown and other functions 5、80 LEVEL ADJUSTABLE OUTPUT: Spot welding machine with 80 level output power adjustable, can be adjusted according to your different needs 1‑80 level, very fine adjustment can make welding more accurate, spot welding effect more perfect 6、HD DISPLAY: Portable spot welder with a reversible screen, clear display, you can clearly know the remaining battery, delay time, temperature and level, through the screen at a glance to understand the working status of the product. The default language is English. You can change as required