#100 Soldering Irons Comparison and Test: TS100, Aoyue 968, 907, Mustool MT223

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I compare typical soldering irons, test the power, heat-up time, temperature regulation, heat transfer, and also their usability.
Links:
Aoyue 968 A+:
907 Constant Temperature Electric Soldering Iron Lead-free 60W:
Mustool® MT223 60W Adjustable Temperature Electric Soldering Iron (not good):
TS100 Digital OLED Programable Interface DC5525 Soldering Iron:
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