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Portable DIY Mini Spot Welding Machine for Lithium Battery Pack Arduino UNO R3 Board + CNC Shield + 4xDRV8825 Driver Kit compatible ```html 11 ```html 11 Low ripple and noise specifications Safety features include automatic shutdown after 30 minutes of inactivity and thermal protection circuits that prevent overheating during rapid fire welding sequences making it ideal for lithium batteries where excessive heat can damage cell chemistry and trigger thermal runaway
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