Item Type: Mini Spot Welder Product Description: 1: This controller is mainly used for welding small battery repair power banks, power tools, model airplanes, etc. 2: This controller requires users to have a certain electronic basis and safety awareness. 3: Although sufficient protection has been done for the drive of the MOS tube, it is inevitable that the explosion tube will appear during use. If there is a explosion tube, just replace one. 4: For those with high welding requirements, please change the welding power source. After actual testing, when the battery uses 3S, 40C, 5000mHA, it can weld 0.1mm nickel-plated steel strip and 0.15mm nickel-plated steel strip perfectly. The welding needle needs to be ground into a round head, the pressing force is reduced, and it can also be welded; When the battery uses 12V, 50AH car level, it can weld 0.15mm nickel-plated steel strip perfectly. Note that it is a car battery, not an ordinary lead-acid battery. Size: Approx. 0.1 ~ 0.15mm / 0 ~ 0.01in