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Upgrade your DIY workshop with this portable Handheld Spot Welder, specially engineered for precision lithium battery maintenance and custom battery pack assembly. Featuring 12 adjustable power output gears, this micro-welding device gives you exact control over weld penetration whether working with 0.1mm to 0.2mm nickel sheets, 18650 cells, or 21700 batteries.\n\nEquipped with integrated 9-level LED task lighting, it provides crystal-clear visibility directly over your contact points, eliminating shadows in tight electronics casings. The built-in rechargeable high-rate lithium battery eliminates clunky external cords, letting you weld with fluid ease. Packed with multi-layer smart temperature and circuit protections, this portable spot welding kit is an essential tool for RC enthusiasts, power tool repairers, and makers who demand clean, reliable spot welds anywhere.