7.4V 400A Battery Spot Welder 18650 Battery Nickel Strip Diy Spot Welding Machine Adjustable Welding 0.25mm Nickel Plating

Features: The 18650 battery pack assembly process, the spot welder is an indispensable important tool, but ordinary spot welder on the market is bulky and has a relatively high weight.  The common spot welder generally adopts a transformer structure and generates a large amount of heat.  The current controlled is not accurate, causing the solder joint to be black or weak.        This product is a compact spot welding machine control board. It is powered by 3 series of iron-lithium batteries.  It can be carried with you. It does not need to be connected to the socket.  The battery capacity is 10000mah. At present, the product supports direct spot welding of nickel tape below 0.25mm, and the adhesion is strong, which is enough for non-industrial buyers.  Used for battery assembly spot welding of 18650, 26650, 32650 battery assembly, etc.  The spot welding machine supports 0.1-0.25mm nickel plating or 0.1-0.15mm thick pure nickel sheet, with strong adhesion. This has just be