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power supply - 3 wires on a (bipolar) DC plug - what are they for? - Electrical Engineering Stack Exchange
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How to fix the 'AC power adapter wattage and type cannot be determined' error on my Dell Latitude E7440 - Quora
Hacking a Dell power adapter — final (not really) | My Not-So-Boring Life
Power Supply Pinouts- ATX, Dell, Power Mac
