B08R7NJFZS KKmoon 4.2V Handheld Spot Welder, Automatic Welding Tools Adjustable for 18650 21700 32650 Lithium Battery Support 0.1-0.15mm Nickel Sheet (Black)

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The welding machine itself has overcurrent protection, low voltage protection, overvoltage protection, and overtemperature protection.

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