Features: Compact size, lightweight and portable, easy to carry around with you. The outcase is made of aluminum alloy material, with sandblasting surface, wear resistant and beautiful. 6 gears of power adjustable, with green indicator light, the welding process is more accurate and the welding effect is more perfect. Multiple protections, with low electric quantity remind function, and low battery automatic shut down function. With fast-recharging function, which can be used as recharge pal, Type-C interface and the max output current is 2.1A. This spot-welding machine can be used to spot-welding cylindrical lithium batteries, such as 14650, 17490, 18650, 21700, 26650, 32650 and etc.. Also supports welding nickel mobilephone battery, compatible with various of mainstream mobilephones. The welding spots are accurate and beautiful, support welding 0.1-0.2mm nickel sheet, iron sheet, stainless steel sheet. Built-in high-rate polymer power cell, the maximum output current is more than 650A, and the max output power is up to 2700W, it can continuously weld thousands of points after being fullyrecharged. Equipped with 5pcs green gears indicator lights, the number of indicator lights corresponding the output gears. With power indicator light, convenient for you to recharge it in time. Aluminum oxide copper welding pen terminal, with fine conductivity and low contact resistance, quickly detachment and easy carrying. The 400mm length spot-welding pen is consists of multiple strands of high temperature wire with fine torsional resistance ability.