How do I power this unit?

Hello, this spot welding pen needs to be connected to a welding machine for use. For power supply, you can directly connect a USB 2A data cable to charge the black battery on it.

Questions & Answers: Spot Welding Pen Automatic Trigger Weld Machine Accessory for 18650 Battery DIY Battery Spot Welder Pen

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Item#: 9SIC5PYKYC0039
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Spot Welding Pen Automatic Trigger Weld Machine Accessory for 18650 Battery DIY Battery Spot Welder Pen

Spot Welding Pen Automatic Trigger Weld Machine Accessory for 18650 Battery DIY Battery Spot Welder Pen

$38^.08 –